Home / 78,724.12-118,111.68-47,129.24

Finding the Fourth Proportional to 78,724.12, 118,111.68 and 47,129.24

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Solution

The fourth proportional to 78,724.12, 118,111.68 and 47,129.24 is: 70,709.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724.12 : 118,111.68 = 47,129.24 : x
  2. Step 2: Convert to fraction form
    78,724.12/118,111.68 = 47,129.24/x
  3. Step 3: Cross multiply
    78,724.12x = 118,111.68 × 47,129.24
  4. Step 4: Simplify right side
    78,724.12x = 5,566,513,713.52
  5. Step 5: Solve for x
    x = 5,566,513,713.52/78,724.12
  6. Step 6: Final answer
    x = 70,709.13

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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.