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Finding the Fourth Proportional to 97,862.80, 135,046.15 and 55,421.64

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Solution

The fourth proportional to 97,862.80, 135,046.15 and 55,421.64 is: 76,479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,862.80 : 135,046.15 = 55,421.64 : x
  2. Step 2: Convert to fraction form
    97,862.80/135,046.15 = 55,421.64/x
  3. Step 3: Cross multiply
    97,862.80x = 135,046.15 × 55,421.64
  4. Step 4: Simplify right side
    97,862.80x = 7,484,479,108.69
  5. Step 5: Solve for x
    x = 7,484,479,108.69/97,862.80
  6. Step 6: Final answer
    x = 76,479.31

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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.