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Finding the Fourth Proportional to 74,859.66, 103,308.21 and 42,592.50

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Solution

The fourth proportional to 74,859.66, 103,308.21 and 42,592.50 is: 58,778.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,859.66 : 103,308.21 = 42,592.50 : x
  2. Step 2: Convert to fraction form
    74,859.66/103,308.21 = 42,592.50/x
  3. Step 3: Cross multiply
    74,859.66x = 103,308.21 × 42,592.50
  4. Step 4: Simplify right side
    74,859.66x = 4,400,154,934.43
  5. Step 5: Solve for x
    x = 4,400,154,934.43/74,859.66
  6. Step 6: Final answer
    x = 58,778.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.