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Finding the Fourth Proportional to 98,247.39, 147,247.82 and 42,021.51

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Solution

The fourth proportional to 98,247.39, 147,247.82 and 42,021.51 is: 62,979.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,247.39 : 147,247.82 = 42,021.51 : x
  2. Step 2: Convert to fraction form
    98,247.39/147,247.82 = 42,021.51/x
  3. Step 3: Cross multiply
    98,247.39x = 147,247.82 × 42,021.51
  4. Step 4: Simplify right side
    98,247.39x = 6,187,575,740.61
  5. Step 5: Solve for x
    x = 6,187,575,740.61/98,247.39
  6. Step 6: Final answer
    x = 62,979.54

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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.