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Finding the Fourth Proportional to 108,708.60, 163,062.90 and 86,401.20

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Solution

The fourth proportional to 108,708.60, 163,062.90 and 86,401.20 is: 129,601.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,708.60 : 163,062.90 = 86,401.20 : x
  2. Step 2: Convert to fraction form
    108,708.60/163,062.90 = 86,401.20/x
  3. Step 3: Cross multiply
    108,708.60x = 163,062.90 × 86,401.20
  4. Step 4: Simplify right side
    108,708.60x = 14,088,830,235.48
  5. Step 5: Solve for x
    x = 14,088,830,235.48/108,708.60
  6. Step 6: Final answer
    x = 129,601.80

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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.