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Finding the Fourth Proportional to 98,607.20, 147,910.80 and 86,943.20

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Solution

The fourth proportional to 98,607.20, 147,910.80 and 86,943.20 is: 130,414.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,607.20 : 147,910.80 = 86,943.20 : x
  2. Step 2: Convert to fraction form
    98,607.20/147,910.80 = 86,943.20/x
  3. Step 3: Cross multiply
    98,607.20x = 147,910.80 × 86,943.20
  4. Step 4: Simplify right side
    98,607.20x = 12,859,838,266.56
  5. Step 5: Solve for x
    x = 12,859,838,266.56/98,607.20
  6. Step 6: Final answer
    x = 130,414.80

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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.