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Finding the Fourth Proportional to 100,291.71, 149,553.65 and 99,392.31

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Solution

The fourth proportional to 100,291.71, 149,553.65 and 99,392.31 is: 148,212.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,291.71 : 149,553.65 = 99,392.31 : x
  2. Step 2: Convert to fraction form
    100,291.71/149,553.65 = 99,392.31/x
  3. Step 3: Cross multiply
    100,291.71x = 149,553.65 × 99,392.31
  4. Step 4: Simplify right side
    100,291.71x = 14,864,482,245.47
  5. Step 5: Solve for x
    x = 14,864,482,245.47/100,291.71
  6. Step 6: Final answer
    x = 148,212.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.