Home / 100,437.54-138,551.04-76,522.70

Finding the Fourth Proportional to 100,437.54, 138,551.04 and 76,522.70

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Solution

The fourth proportional to 100,437.54, 138,551.04 and 76,522.70 is: 105,561.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,437.54 : 138,551.04 = 76,522.70 : x
  2. Step 2: Convert to fraction form
    100,437.54/138,551.04 = 76,522.70/x
  3. Step 3: Cross multiply
    100,437.54x = 138,551.04 × 76,522.70
  4. Step 4: Simplify right side
    100,437.54x = 10,602,299,668.61
  5. Step 5: Solve for x
    x = 10,602,299,668.61/100,437.54
  6. Step 6: Final answer
    x = 105,561.12

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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.