Home / 53,915.74-80,931.12-47,715.20

Finding the Fourth Proportional to 53,915.74, 80,931.12 and 47,715.20

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Solution

The fourth proportional to 53,915.74, 80,931.12 and 47,715.20 is: 71,623.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,915.74 : 80,931.12 = 47,715.20 : x
  2. Step 2: Convert to fraction form
    53,915.74/80,931.12 = 47,715.20/x
  3. Step 3: Cross multiply
    53,915.74x = 80,931.12 × 47,715.20
  4. Step 4: Simplify right side
    53,915.74x = 3,861,644,577.02
  5. Step 5: Solve for x
    x = 3,861,644,577.02/53,915.74
  6. Step 6: Final answer
    x = 71,623.70

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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.