Home / 74,621.20-111,931.80-66,456.40

Finding the Fourth Proportional to 74,621.20, 111,931.80 and 66,456.40

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Solution

The fourth proportional to 74,621.20, 111,931.80 and 66,456.40 is: 99,684.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,621.20 : 111,931.80 = 66,456.40 : x
  2. Step 2: Convert to fraction form
    74,621.20/111,931.80 = 66,456.40/x
  3. Step 3: Cross multiply
    74,621.20x = 111,931.80 × 66,456.40
  4. Step 4: Simplify right side
    74,621.20x = 7,438,584,473.52
  5. Step 5: Solve for x
    x = 7,438,584,473.52/74,621.20
  6. Step 6: Final answer
    x = 99,684.60

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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.