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Finding the Fourth Proportional to 104,031.60, 156,047.40 and 86,521.20

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Solution

The fourth proportional to 104,031.60, 156,047.40 and 86,521.20 is: 129,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,031.60 : 156,047.40 = 86,521.20 : x
  2. Step 2: Convert to fraction form
    104,031.60/156,047.40 = 86,521.20/x
  3. Step 3: Cross multiply
    104,031.60x = 156,047.40 × 86,521.20
  4. Step 4: Simplify right side
    104,031.60x = 13,501,408,304.88
  5. Step 5: Solve for x
    x = 13,501,408,304.88/104,031.60
  6. Step 6: Final answer
    x = 129,781.80

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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.