Home / 138,779.10-208,117.45-45,287.90

Finding the Fourth Proportional to 138,779.10, 208,117.45 and 45,287.90

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Solution

The fourth proportional to 138,779.10, 208,117.45 and 45,287.90 is: 67,915.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,779.10 : 208,117.45 = 45,287.90 : x
  2. Step 2: Convert to fraction form
    138,779.10/208,117.45 = 45,287.90/x
  3. Step 3: Cross multiply
    138,779.10x = 208,117.45 × 45,287.90
  4. Step 4: Simplify right side
    138,779.10x = 9,425,202,263.86
  5. Step 5: Solve for x
    x = 9,425,202,263.86/138,779.10
  6. Step 6: Final answer
    x = 67,915.14

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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.