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Finding the Fourth Proportional to 98,763.48, 148,169.52 and 28,641.78

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Solution

The fourth proportional to 98,763.48, 148,169.52 and 28,641.78 is: 42,969.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,763.48 : 148,169.52 = 28,641.78 : x
  2. Step 2: Convert to fraction form
    98,763.48/148,169.52 = 28,641.78/x
  3. Step 3: Cross multiply
    98,763.48x = 148,169.52 × 28,641.78
  4. Step 4: Simplify right side
    98,763.48x = 4,243,838,794.55
  5. Step 5: Solve for x
    x = 4,243,838,794.55/98,763.48
  6. Step 6: Final answer
    x = 42,969.72

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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.