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Finding the Fourth Proportional to 100,686.40, 151,029.60 and 67,508.80

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Solution

The fourth proportional to 100,686.40, 151,029.60 and 67,508.80 is: 101,263.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,686.40 : 151,029.60 = 67,508.80 : x
  2. Step 2: Convert to fraction form
    100,686.40/151,029.60 = 67,508.80/x
  3. Step 3: Cross multiply
    100,686.40x = 151,029.60 × 67,508.80
  4. Step 4: Simplify right side
    100,686.40x = 10,195,827,060.48
  5. Step 5: Solve for x
    x = 10,195,827,060.48/100,686.40
  6. Step 6: Final answer
    x = 101,263.20

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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.