Home / 90,910.76-136,428.44-31,746.40

Finding the Fourth Proportional to 90,910.76, 136,428.44 and 31,746.40

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Solution

The fourth proportional to 90,910.76, 136,428.44 and 31,746.40 is: 47,641.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,910.76 : 136,428.44 = 31,746.40 : x
  2. Step 2: Convert to fraction form
    90,910.76/136,428.44 = 31,746.40/x
  3. Step 3: Cross multiply
    90,910.76x = 136,428.44 × 31,746.40
  4. Step 4: Simplify right side
    90,910.76x = 4,331,111,827.62
  5. Step 5: Solve for x
    x = 4,331,111,827.62/90,910.76
  6. Step 6: Final answer
    x = 47,641.36

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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.