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Finding the Fourth Proportional to 98,356.80, 147,301.92 and 70,207.68

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Solution

The fourth proportional to 98,356.80, 147,301.92 and 70,207.68 is: 105,145.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,356.80 : 147,301.92 = 70,207.68 : x
  2. Step 2: Convert to fraction form
    98,356.80/147,301.92 = 70,207.68/x
  3. Step 3: Cross multiply
    98,356.80x = 147,301.92 × 70,207.68
  4. Step 4: Simplify right side
    98,356.80x = 10,341,726,062.75
  5. Step 5: Solve for x
    x = 10,341,726,062.75/98,356.80
  6. Step 6: Final answer
    x = 105,145.00

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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.