Home / 138,428.23-207,543.93-66,298.54

Finding the Fourth Proportional to 138,428.23, 207,543.93 and 66,298.54

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Solution

The fourth proportional to 138,428.23, 207,543.93 and 66,298.54 is: 99,400.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,428.23 : 207,543.93 = 66,298.54 : x
  2. Step 2: Convert to fraction form
    138,428.23/207,543.93 = 66,298.54/x
  3. Step 3: Cross multiply
    138,428.23x = 207,543.93 × 66,298.54
  4. Step 4: Simplify right side
    138,428.23x = 13,759,859,544.86
  5. Step 5: Solve for x
    x = 13,759,859,544.86/138,428.23
  6. Step 6: Final answer
    x = 99,400.68

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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.