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Finding the Fourth Proportional to 98,717.40, 147,978.90 and 48,805.20

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Solution

The fourth proportional to 98,717.40, 147,978.90 and 48,805.20 is: 73,159.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,717.40 : 147,978.90 = 48,805.20 : x
  2. Step 2: Convert to fraction form
    98,717.40/147,978.90 = 48,805.20/x
  3. Step 3: Cross multiply
    98,717.40x = 147,978.90 × 48,805.20
  4. Step 4: Simplify right side
    98,717.40x = 7,222,139,810.28
  5. Step 5: Solve for x
    x = 7,222,139,810.28/98,717.40
  6. Step 6: Final answer
    x = 73,159.74

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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.