Home / 72,119.12-99,517.80-40,283.60

Finding the Fourth Proportional to 72,119.12, 99,517.80 and 40,283.60

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Solution

The fourth proportional to 72,119.12, 99,517.80 and 40,283.60 is: 55,587.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,119.12 : 99,517.80 = 40,283.60 : x
  2. Step 2: Convert to fraction form
    72,119.12/99,517.80 = 40,283.60/x
  3. Step 3: Cross multiply
    72,119.12x = 99,517.80 × 40,283.60
  4. Step 4: Simplify right side
    72,119.12x = 4,008,935,248.08
  5. Step 5: Solve for x
    x = 4,008,935,248.08/72,119.12
  6. Step 6: Final answer
    x = 55,587.69

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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.