Home / 72,220.38-99,668.93-40,387.38

Finding the Fourth Proportional to 72,220.38, 99,668.93 and 40,387.38

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Solution

The fourth proportional to 72,220.38, 99,668.93 and 40,387.38 is: 55,737.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.38 : 99,668.93 = 40,387.38 : x
  2. Step 2: Convert to fraction form
    72,220.38/99,668.93 = 40,387.38/x
  3. Step 3: Cross multiply
    72,220.38x = 99,668.93 × 40,387.38
  4. Step 4: Simplify right side
    72,220.38x = 4,025,366,748.17
  5. Step 5: Solve for x
    x = 4,025,366,748.17/72,220.38
  6. Step 6: Final answer
    x = 55,737.27

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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.