Home / 81,799.16-122,641.28-31,837.12

Finding the Fourth Proportional to 81,799.16, 122,641.28 and 31,837.12

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Solution

The fourth proportional to 81,799.16, 122,641.28 and 31,837.12 is: 47,733.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,799.16 : 122,641.28 = 31,837.12 : x
  2. Step 2: Convert to fraction form
    81,799.16/122,641.28 = 31,837.12/x
  3. Step 3: Cross multiply
    81,799.16x = 122,641.28 × 31,837.12
  4. Step 4: Simplify right side
    81,799.16x = 3,904,545,148.31
  5. Step 5: Solve for x
    x = 3,904,545,148.31/81,799.16
  6. Step 6: Final answer
    x = 47,733.32

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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.