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Finding the Fourth Proportional to 100,047.69, 138,100.55 and 57,623.13

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Solution

The fourth proportional to 100,047.69, 138,100.55 and 57,623.13 is: 79,539.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,047.69 : 138,100.55 = 57,623.13 : x
  2. Step 2: Convert to fraction form
    100,047.69/138,100.55 = 57,623.13/x
  3. Step 3: Cross multiply
    100,047.69x = 138,100.55 × 57,623.13
  4. Step 4: Simplify right side
    100,047.69x = 7,957,785,657.61
  5. Step 5: Solve for x
    x = 7,957,785,657.61/100,047.69
  6. Step 6: Final answer
    x = 79,539.92

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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.