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Finding the Fourth Proportional to 82,708.56, 124,015.76 and 56,445.12

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Solution

The fourth proportional to 82,708.56, 124,015.76 and 56,445.12 is: 84,635.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,708.56 : 124,015.76 = 56,445.12 : x
  2. Step 2: Convert to fraction form
    82,708.56/124,015.76 = 56,445.12/x
  3. Step 3: Cross multiply
    82,708.56x = 124,015.76 × 56,445.12
  4. Step 4: Simplify right side
    82,708.56x = 7,000,084,455.09
  5. Step 5: Solve for x
    x = 7,000,084,455.09/82,708.56
  6. Step 6: Final answer
    x = 84,635.55

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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.