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Finding the Fourth Proportional to 100,151.84, 138,049.80 and 67,876.40

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Solution

The fourth proportional to 100,151.84, 138,049.80 and 67,876.40 is: 93,561.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,151.84 : 138,049.80 = 67,876.40 : x
  2. Step 2: Convert to fraction form
    100,151.84/138,049.80 = 67,876.40/x
  3. Step 3: Cross multiply
    100,151.84x = 138,049.80 × 67,876.40
  4. Step 4: Simplify right side
    100,151.84x = 9,370,323,444.72
  5. Step 5: Solve for x
    x = 9,370,323,444.72/100,151.84
  6. Step 6: Final answer
    x = 93,561.17

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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.