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Finding the Fourth Proportional to 100,360.59, 138,503.84 and 55,648.59

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Solution

The fourth proportional to 100,360.59, 138,503.84 and 55,648.59 is: 76,798.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,360.59 : 138,503.84 = 55,648.59 : x
  2. Step 2: Convert to fraction form
    100,360.59/138,503.84 = 55,648.59/x
  3. Step 3: Cross multiply
    100,360.59x = 138,503.84 × 55,648.59
  4. Step 4: Simplify right side
    100,360.59x = 7,707,543,127.34
  5. Step 5: Solve for x
    x = 7,707,543,127.34/100,360.59
  6. Step 6: Final answer
    x = 76,798.50

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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.