Home / 89,123.04-122,989.76-49,379.04

Finding the Fourth Proportional to 89,123.04, 122,989.76 and 49,379.04

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Solution

The fourth proportional to 89,123.04, 122,989.76 and 49,379.04 is: 68,143.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,123.04 : 122,989.76 = 49,379.04 : x
  2. Step 2: Convert to fraction form
    89,123.04/122,989.76 = 49,379.04/x
  3. Step 3: Cross multiply
    89,123.04x = 122,989.76 × 49,379.04
  4. Step 4: Simplify right side
    89,123.04x = 6,073,116,278.63
  5. Step 5: Solve for x
    x = 6,073,116,278.63/89,123.04
  6. Step 6: Final answer
    x = 68,143.06

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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.