Home / 138,292.18-207,428.55-78,941.86

Finding the Fourth Proportional to 138,292.18, 207,428.55 and 78,941.86

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Solution

The fourth proportional to 138,292.18, 207,428.55 and 78,941.86 is: 118,407.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,292.18 : 207,428.55 = 78,941.86 : x
  2. Step 2: Convert to fraction form
    138,292.18/207,428.55 = 78,941.86/x
  3. Step 3: Cross multiply
    138,292.18x = 207,428.55 × 78,941.86
  4. Step 4: Simplify right side
    138,292.18x = 16,374,795,554.10
  5. Step 5: Solve for x
    x = 16,374,795,554.10/138,292.18
  6. Step 6: Final answer
    x = 118,407.24

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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.