Home / 90,316.32-135,425.10-71,715.84

Finding the Fourth Proportional to 90,316.32, 135,425.10 and 71,715.84

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Solution

The fourth proportional to 90,316.32, 135,425.10 and 71,715.84 is: 107,534.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,316.32 : 135,425.10 = 71,715.84 : x
  2. Step 2: Convert to fraction form
    90,316.32/135,425.10 = 71,715.84/x
  3. Step 3: Cross multiply
    90,316.32x = 135,425.10 × 71,715.84
  4. Step 4: Simplify right side
    90,316.32x = 9,712,124,803.58
  5. Step 5: Solve for x
    x = 9,712,124,803.58/90,316.32
  6. Step 6: Final answer
    x = 107,534.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.