Home / 72,720.38-100,355.34-47,569.88

Finding the Fourth Proportional to 72,720.38, 100,355.34 and 47,569.88

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Solution

The fourth proportional to 72,720.38, 100,355.34 and 47,569.88 is: 65,647.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,720.38 : 100,355.34 = 47,569.88 : x
  2. Step 2: Convert to fraction form
    72,720.38/100,355.34 = 47,569.88/x
  3. Step 3: Cross multiply
    72,720.38x = 100,355.34 × 47,569.88
  4. Step 4: Simplify right side
    72,720.38x = 4,773,890,979.38
  5. Step 5: Solve for x
    x = 4,773,890,979.38/72,720.38
  6. Step 6: Final answer
    x = 65,647.23

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1.5x scale

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.