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Finding the Fourth Proportional to 96,386.20, 144,492.90 and 85,888.60

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Solution

The fourth proportional to 96,386.20, 144,492.90 and 85,888.60 is: 128,755.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,386.20 : 144,492.90 = 85,888.60 : x
  2. Step 2: Convert to fraction form
    96,386.20/144,492.90 = 85,888.60/x
  3. Step 3: Cross multiply
    96,386.20x = 144,492.90 × 85,888.60
  4. Step 4: Simplify right side
    96,386.20x = 12,410,292,890.94
  5. Step 5: Solve for x
    x = 12,410,292,890.94/96,386.20
  6. Step 6: Final answer
    x = 128,755.91

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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.