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Finding the Fourth Proportional to 64,915.80, 97,373.70 and 42,754.20

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Solution

The fourth proportional to 64,915.80, 97,373.70 and 42,754.20 is: 64,131.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,915.80 : 97,373.70 = 42,754.20 : x
  2. Step 2: Convert to fraction form
    64,915.80/97,373.70 = 42,754.20/x
  3. Step 3: Cross multiply
    64,915.80x = 97,373.70 × 42,754.20
  4. Step 4: Simplify right side
    64,915.80x = 4,163,134,644.54
  5. Step 5: Solve for x
    x = 4,163,134,644.54/64,915.80
  6. Step 6: Final answer
    x = 64,131.30

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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.