Home / 209,790,877.80-314,686,316.70-128,161,540.20

Finding the Fourth Proportional to 209,790,877.80, 314,686,316.70 and 128,161,540.20

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Solution

The fourth proportional to 209,790,877.80, 314,686,316.70 and 128,161,540.20 is: 192,242,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,790,877.80 : 314,686,316.70 = 128,161,540.20 : x
  2. Step 2: Convert to fraction form
    209,790,877.80/314,686,316.70 = 128,161,540.20/x
  3. Step 3: Cross multiply
    209,790,877.80x = 314,686,316.70 × 128,161,540.20
  4. Step 4: Simplify right side
    209,790,877.80x = 40,330,683,028,136,984
  5. Step 5: Solve for x
    x = 40,330,683,028,136,984/209,790,877.80
  6. Step 6: Final answer
    x = 192,242,310.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.