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Finding the Fourth Proportional to 85,502.80, 117,959.36 and 56,836.32

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Solution

The fourth proportional to 85,502.80, 117,959.36 and 56,836.32 is: 78,411.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,502.80 : 117,959.36 = 56,836.32 : x
  2. Step 2: Convert to fraction form
    85,502.80/117,959.36 = 56,836.32/x
  3. Step 3: Cross multiply
    85,502.80x = 117,959.36 × 56,836.32
  4. Step 4: Simplify right side
    85,502.80x = 6,704,375,931.96
  5. Step 5: Solve for x
    x = 6,704,375,931.96/85,502.80
  6. Step 6: Final answer
    x = 78,411.19

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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.