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Finding the Fourth Proportional to 121,373.78, 182,086.68 and 42,490.58

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Solution

The fourth proportional to 121,373.78, 182,086.68 and 42,490.58 is: 63,744.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,373.78 : 182,086.68 = 42,490.58 : x
  2. Step 2: Convert to fraction form
    121,373.78/182,086.68 = 42,490.58/x
  3. Step 3: Cross multiply
    121,373.78x = 182,086.68 × 42,490.58
  4. Step 4: Simplify right side
    121,373.78x = 7,736,968,643.47
  5. Step 5: Solve for x
    x = 7,736,968,643.47/121,373.78
  6. Step 6: Final answer
    x = 63,744.98

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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.