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Finding the Fourth Proportional to 96,420.30, 144,630.45 and 86,603.10

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Solution

The fourth proportional to 96,420.30, 144,630.45 and 86,603.10 is: 129,904.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,420.30 : 144,630.45 = 86,603.10 : x
  2. Step 2: Convert to fraction form
    96,420.30/144,630.45 = 86,603.10/x
  3. Step 3: Cross multiply
    96,420.30x = 144,630.45 × 86,603.10
  4. Step 4: Simplify right side
    96,420.30x = 12,525,445,324.40
  5. Step 5: Solve for x
    x = 12,525,445,324.40/96,420.30
  6. Step 6: Final answer
    x = 129,904.65

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Similar ratio
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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.