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Finding the Fourth Proportional to 86,394.78, 129,268.98 and 61,492.14

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Solution

The fourth proportional to 86,394.78, 129,268.98 and 61,492.14 is: 92,008.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,394.78 : 129,268.98 = 61,492.14 : x
  2. Step 2: Convert to fraction form
    86,394.78/129,268.98 = 61,492.14/x
  3. Step 3: Cross multiply
    86,394.78x = 129,268.98 × 61,492.14
  4. Step 4: Simplify right side
    86,394.78x = 7,949,026,215.82
  5. Step 5: Solve for x
    x = 7,949,026,215.82/86,394.78
  6. Step 6: Final answer
    x = 92,008.18

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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.