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Finding the Fourth Proportional to 64,931.80, 97,397.70 and 53,258.20

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Solution

The fourth proportional to 64,931.80, 97,397.70 and 53,258.20 is: 79,887.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,931.80 : 97,397.70 = 53,258.20 : x
  2. Step 2: Convert to fraction form
    64,931.80/97,397.70 = 53,258.20/x
  3. Step 3: Cross multiply
    64,931.80x = 97,397.70 × 53,258.20
  4. Step 4: Simplify right side
    64,931.80x = 5,187,226,186.14
  5. Step 5: Solve for x
    x = 5,187,226,186.14/64,931.80
  6. Step 6: Final answer
    x = 79,887.30

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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.