Home / 123,572.28-170,547.92-78,254.40

Finding the Fourth Proportional to 123,572.28, 170,547.92 and 78,254.40

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Solution

The fourth proportional to 123,572.28, 170,547.92 and 78,254.40 is: 108,002.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,572.28 : 170,547.92 = 78,254.40 : x
  2. Step 2: Convert to fraction form
    123,572.28/170,547.92 = 78,254.40/x
  3. Step 3: Cross multiply
    123,572.28x = 170,547.92 × 78,254.40
  4. Step 4: Simplify right side
    123,572.28x = 13,346,125,150.85
  5. Step 5: Solve for x
    x = 13,346,125,150.85/123,572.28
  6. Step 6: Final answer
    x = 108,002.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.