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Finding the Fourth Proportional to 100,339.48, 138,472.73 and 60,045.45

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Solution

The fourth proportional to 100,339.48, 138,472.73 and 60,045.45 is: 82,865.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,339.48 : 138,472.73 = 60,045.45 : x
  2. Step 2: Convert to fraction form
    100,339.48/138,472.73 = 60,045.45/x
  3. Step 3: Cross multiply
    100,339.48x = 138,472.73 × 60,045.45
  4. Step 4: Simplify right side
    100,339.48x = 8,314,657,385.58
  5. Step 5: Solve for x
    x = 8,314,657,385.58/100,339.48
  6. Step 6: Final answer
    x = 82,865.26

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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.