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Finding the Fourth Proportional to 71,215.20, 106,822.80 and 59,637.60

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Solution

The fourth proportional to 71,215.20, 106,822.80 and 59,637.60 is: 89,456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,215.20 : 106,822.80 = 59,637.60 : x
  2. Step 2: Convert to fraction form
    71,215.20/106,822.80 = 59,637.60/x
  3. Step 3: Cross multiply
    71,215.20x = 106,822.80 × 59,637.60
  4. Step 4: Simplify right side
    71,215.20x = 6,370,655,417.28
  5. Step 5: Solve for x
    x = 6,370,655,417.28/71,215.20
  6. Step 6: Final answer
    x = 89,456.40

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1.5x scale

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.