Home / 85,551,080.80-128,326,621.20-81,569,768.80

Finding the Fourth Proportional to 85,551,080.80, 128,326,621.20 and 81,569,768.80

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Solution

The fourth proportional to 85,551,080.80, 128,326,621.20 and 81,569,768.80 is: 122,354,653.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551,080.80 : 128,326,621.20 = 81,569,768.80 : x
  2. Step 2: Convert to fraction form
    85,551,080.80/128,326,621.20 = 81,569,768.80/x
  3. Step 3: Cross multiply
    85,551,080.80x = 128,326,621.20 × 81,569,768.80
  4. Step 4: Simplify right side
    85,551,080.80x = 10,467,572,822,169,178
  5. Step 5: Solve for x
    x = 10,467,572,822,169,178/85,551,080.80
  6. Step 6: Final answer
    x = 122,354,653.20

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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.