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Finding the Fourth Proportional to 65,242.80, 97,864.20 and 38,977.20

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Solution

The fourth proportional to 65,242.80, 97,864.20 and 38,977.20 is: 58,465.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,242.80 : 97,864.20 = 38,977.20 : x
  2. Step 2: Convert to fraction form
    65,242.80/97,864.20 = 38,977.20/x
  3. Step 3: Cross multiply
    65,242.80x = 97,864.20 × 38,977.20
  4. Step 4: Simplify right side
    65,242.80x = 3,814,472,496.24
  5. Step 5: Solve for x
    x = 3,814,472,496.24/65,242.80
  6. Step 6: Final answer
    x = 58,465.80

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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.