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Finding the Fourth Proportional to 138,462.30, 191,078.10 and 74,800.08

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Solution

The fourth proportional to 138,462.30, 191,078.10 and 74,800.08 is: 103,224.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,462.30 : 191,078.10 = 74,800.08 : x
  2. Step 2: Convert to fraction form
    138,462.30/191,078.10 = 74,800.08/x
  3. Step 3: Cross multiply
    138,462.30x = 191,078.10 × 74,800.08
  4. Step 4: Simplify right side
    138,462.30x = 14,292,657,166.25
  5. Step 5: Solve for x
    x = 14,292,657,166.25/138,462.30
  6. Step 6: Final answer
    x = 103,224.18

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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.