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Finding the Fourth Proportional to 99,720.96, 137,645.63 and 61,492.52

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Solution

The fourth proportional to 99,720.96, 137,645.63 and 61,492.52 is: 84,878.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,720.96 : 137,645.63 = 61,492.52 : x
  2. Step 2: Convert to fraction form
    99,720.96/137,645.63 = 61,492.52/x
  3. Step 3: Cross multiply
    99,720.96x = 137,645.63 × 61,492.52
  4. Step 4: Simplify right side
    99,720.96x = 8,464,175,660.00
  5. Step 5: Solve for x
    x = 8,464,175,660.00/99,720.96
  6. Step 6: Final answer
    x = 84,878.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.