Home / 88,225.68-121,815-54,279.84

Finding the Fourth Proportional to 88,225.68, 121,815 and 54,279.84

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Solution

The fourth proportional to 88,225.68, 121,815 and 54,279.84 is: 74,945.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,225.68 : 121,815 = 54,279.84 : x
  2. Step 2: Convert to fraction form
    88,225.68/121,815 = 54,279.84/x
  3. Step 3: Cross multiply
    88,225.68x = 121,815 × 54,279.84
  4. Step 4: Simplify right side
    88,225.68x = 6,612,098,709.60
  5. Step 5: Solve for x
    x = 6,612,098,709.60/88,225.68
  6. Step 6: Final answer
    x = 74,945.28

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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.