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Finding the Fourth Proportional to 100,370.52, 138,498.56 and 57,352.80

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Solution

The fourth proportional to 100,370.52, 138,498.56 and 57,352.80 is: 79,139.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,370.52 : 138,498.56 = 57,352.80 : x
  2. Step 2: Convert to fraction form
    100,370.52/138,498.56 = 57,352.80/x
  3. Step 3: Cross multiply
    100,370.52x = 138,498.56 × 57,352.80
  4. Step 4: Simplify right side
    100,370.52x = 7,943,279,925.20
  5. Step 5: Solve for x
    x = 7,943,279,925.20/100,370.52
  6. Step 6: Final answer
    x = 79,139.57

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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.