Home / 89,874.10-134,811.15-72,378.10

Finding the Fourth Proportional to 89,874.10, 134,811.15 and 72,378.10

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Solution

The fourth proportional to 89,874.10, 134,811.15 and 72,378.10 is: 108,567.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,874.10 : 134,811.15 = 72,378.10 : x
  2. Step 2: Convert to fraction form
    89,874.10/134,811.15 = 72,378.10/x
  3. Step 3: Cross multiply
    89,874.10x = 134,811.15 × 72,378.10
  4. Step 4: Simplify right side
    89,874.10x = 9,757,374,895.82
  5. Step 5: Solve for x
    x = 9,757,374,895.82/89,874.10
  6. Step 6: Final answer
    x = 108,567.15

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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.