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Finding the Fourth Proportional to 81,465.84, 112,577.20 and 61,287.68

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Solution

The fourth proportional to 81,465.84, 112,577.20 and 61,287.68 is: 84,693.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,465.84 : 112,577.20 = 61,287.68 : x
  2. Step 2: Convert to fraction form
    81,465.84/112,577.20 = 61,287.68/x
  3. Step 3: Cross multiply
    81,465.84x = 112,577.20 × 61,287.68
  4. Step 4: Simplify right side
    81,465.84x = 6,899,595,408.90
  5. Step 5: Solve for x
    x = 6,899,595,408.90/81,465.84
  6. Step 6: Final answer
    x = 84,693.11

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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.