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Finding the Fourth Proportional to 82,718.40, 124,077.60 and 43,287.60

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Solution

The fourth proportional to 82,718.40, 124,077.60 and 43,287.60 is: 64,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,718.40 : 124,077.60 = 43,287.60 : x
  2. Step 2: Convert to fraction form
    82,718.40/124,077.60 = 43,287.60/x
  3. Step 3: Cross multiply
    82,718.40x = 124,077.60 × 43,287.60
  4. Step 4: Simplify right side
    82,718.40x = 5,371,021,517.76
  5. Step 5: Solve for x
    x = 5,371,021,517.76/82,718.40
  6. Step 6: Final answer
    x = 64,931.40

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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.