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Finding the Fourth Proportional to 64,431.85, 89,001.12 and 53,711.74

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Solution

The fourth proportional to 64,431.85, 89,001.12 and 53,711.74 is: 74,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,431.85 : 89,001.12 = 53,711.74 : x
  2. Step 2: Convert to fraction form
    64,431.85/89,001.12 = 53,711.74/x
  3. Step 3: Cross multiply
    64,431.85x = 89,001.12 × 53,711.74
  4. Step 4: Simplify right side
    64,431.85x = 4,780,405,017.15
  5. Step 5: Solve for x
    x = 4,780,405,017.15/64,431.85
  6. Step 6: Final answer
    x = 74,193.20

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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.