Home / 81,013.40-121,325.70-39,411.80

Finding the Fourth Proportional to 81,013.40, 121,325.70 and 39,411.80

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Solution

The fourth proportional to 81,013.40, 121,325.70 and 39,411.80 is: 59,023.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.40 : 121,325.70 = 39,411.80 : x
  2. Step 2: Convert to fraction form
    81,013.40/121,325.70 = 39,411.80/x
  3. Step 3: Cross multiply
    81,013.40x = 121,325.70 × 39,411.80
  4. Step 4: Simplify right side
    81,013.40x = 4,781,664,223.26
  5. Step 5: Solve for x
    x = 4,781,664,223.26/81,013.40
  6. Step 6: Final answer
    x = 59,023.13

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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.