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Finding the Fourth Proportional to 122,490.64, 183,762.18 and 42,531.10

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Solution

The fourth proportional to 122,490.64, 183,762.18 and 42,531.10 is: 63,805.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,490.64 : 183,762.18 = 42,531.10 : x
  2. Step 2: Convert to fraction form
    122,490.64/183,762.18 = 42,531.10/x
  3. Step 3: Cross multiply
    122,490.64x = 183,762.18 × 42,531.10
  4. Step 4: Simplify right side
    122,490.64x = 7,815,607,653.80
  5. Step 5: Solve for x
    x = 7,815,607,653.80/122,490.64
  6. Step 6: Final answer
    x = 63,805.75

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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.