Home / 81,070.40-121,569.15-31,133.90

Finding the Fourth Proportional to 81,070.40, 121,569.15 and 31,133.90

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Solution

The fourth proportional to 81,070.40, 121,569.15 and 31,133.90 is: 46,686.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,070.40 : 121,569.15 = 31,133.90 : x
  2. Step 2: Convert to fraction form
    81,070.40/121,569.15 = 31,133.90/x
  3. Step 3: Cross multiply
    81,070.40x = 121,569.15 × 31,133.90
  4. Step 4: Simplify right side
    81,070.40x = 3,784,921,759.19
  5. Step 5: Solve for x
    x = 3,784,921,759.19/81,070.40
  6. Step 6: Final answer
    x = 46,686.85

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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.