Home / 210,191.80-314,769.30-139,689.40

Finding the Fourth Proportional to 210,191.80, 314,769.30 and 139,689.40

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Solution

The fourth proportional to 210,191.80, 314,769.30 and 139,689.40 is: 209,189.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,191.80 : 314,769.30 = 139,689.40 : x
  2. Step 2: Convert to fraction form
    210,191.80/314,769.30 = 139,689.40/x
  3. Step 3: Cross multiply
    210,191.80x = 314,769.30 × 139,689.40
  4. Step 4: Simplify right side
    210,191.80x = 43,969,934,655.42
  5. Step 5: Solve for x
    x = 43,969,934,655.42/210,191.80
  6. Step 6: Final answer
    x = 209,189.58

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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.