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Finding the Fourth Proportional to 108,308.76, 149,503.73 and 74,429.40

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Solution

The fourth proportional to 108,308.76, 149,503.73 and 74,429.40 is: 102,738.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,308.76 : 149,503.73 = 74,429.40 : x
  2. Step 2: Convert to fraction form
    108,308.76/149,503.73 = 74,429.40/x
  3. Step 3: Cross multiply
    108,308.76x = 149,503.73 × 74,429.40
  4. Step 4: Simplify right side
    108,308.76x = 11,127,472,549.52
  5. Step 5: Solve for x
    x = 11,127,472,549.52/108,308.76
  6. Step 6: Final answer
    x = 102,738.44

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1.5x scale

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.