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Finding the Fourth Proportional to 71,980.59, 99,333.16 and 40,149.48

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Solution

The fourth proportional to 71,980.59, 99,333.16 and 40,149.48 is: 55,406.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,980.59 : 99,333.16 = 40,149.48 : x
  2. Step 2: Convert to fraction form
    71,980.59/99,333.16 = 40,149.48/x
  3. Step 3: Cross multiply
    71,980.59x = 99,333.16 × 40,149.48
  4. Step 4: Simplify right side
    71,980.59x = 3,988,174,720.76
  5. Step 5: Solve for x
    x = 3,988,174,720.76/71,980.59
  6. Step 6: Final answer
    x = 55,406.25

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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.