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Finding the Fourth Proportional to 108,655.20, 162,885.60 and 71,233.20

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Solution

The fourth proportional to 108,655.20, 162,885.60 and 71,233.20 is: 106,786.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,655.20 : 162,885.60 = 71,233.20 : x
  2. Step 2: Convert to fraction form
    108,655.20/162,885.60 = 71,233.20/x
  3. Step 3: Cross multiply
    108,655.20x = 162,885.60 × 71,233.20
  4. Step 4: Simplify right side
    108,655.20x = 11,602,862,521.92
  5. Step 5: Solve for x
    x = 11,602,862,521.92/108,655.20
  6. Step 6: Final answer
    x = 106,786.08

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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.