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Finding the Fourth Proportional to 98,618.54, 148,033.20 and 42,486.53

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Solution

The fourth proportional to 98,618.54, 148,033.20 and 42,486.53 is: 63,775.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,618.54 : 148,033.20 = 42,486.53 : x
  2. Step 2: Convert to fraction form
    98,618.54/148,033.20 = 42,486.53/x
  3. Step 3: Cross multiply
    98,618.54x = 148,033.20 × 42,486.53
  4. Step 4: Simplify right side
    98,618.54x = 6,289,416,992.80
  5. Step 5: Solve for x
    x = 6,289,416,992.80/98,618.54
  6. Step 6: Final answer
    x = 63,775.20

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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.