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Finding the Fourth Proportional to 99,081, 136,627.56 and 76,423.68

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Solution

The fourth proportional to 99,081, 136,627.56 and 76,423.68 is: 105,384.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,081 : 136,627.56 = 76,423.68 : x
  2. Step 2: Convert to fraction form
    99,081/136,627.56 = 76,423.68/x
  3. Step 3: Cross multiply
    99,081x = 136,627.56 × 76,423.68
  4. Step 4: Simplify right side
    99,081x = 10,441,580,924.62
  5. Step 5: Solve for x
    x = 10,441,580,924.62/99,081
  6. Step 6: Final answer
    x = 105,384.29

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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.