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Finding the Fourth Proportional to 138,587.22, 191,250.32 and 74,925

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Solution

The fourth proportional to 138,587.22, 191,250.32 and 74,925 is: 103,396.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,587.22 : 191,250.32 = 74,925 : x
  2. Step 2: Convert to fraction form
    138,587.22/191,250.32 = 74,925/x
  3. Step 3: Cross multiply
    138,587.22x = 191,250.32 × 74,925
  4. Step 4: Simplify right side
    138,587.22x = 14,329,429,851.38
  5. Step 5: Solve for x
    x = 14,329,429,851.38/138,587.22
  6. Step 6: Final answer
    x = 103,396.47

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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.