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Finding the Fourth Proportional to 98,555.20, 147,938.02 and 42,423.10

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Solution

The fourth proportional to 98,555.20, 147,938.02 and 42,423.10 is: 63,679.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,555.20 : 147,938.02 = 42,423.10 : x
  2. Step 2: Convert to fraction form
    98,555.20/147,938.02 = 42,423.10/x
  3. Step 3: Cross multiply
    98,555.20x = 147,938.02 × 42,423.10
  4. Step 4: Simplify right side
    98,555.20x = 6,275,989,416.26
  5. Step 5: Solve for x
    x = 6,275,989,416.26/98,555.20
  6. Step 6: Final answer
    x = 63,679.94

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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.