Home / 86,445.78-129,446.37-69,499.14

Finding the Fourth Proportional to 86,445.78, 129,446.37 and 69,499.14

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Solution

The fourth proportional to 86,445.78, 129,446.37 and 69,499.14 is: 104,069.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,445.78 : 129,446.37 = 69,499.14 : x
  2. Step 2: Convert to fraction form
    86,445.78/129,446.37 = 69,499.14/x
  3. Step 3: Cross multiply
    86,445.78x = 129,446.37 × 69,499.14
  4. Step 4: Simplify right side
    86,445.78x = 8,996,411,391.12
  5. Step 5: Solve for x
    x = 8,996,411,391.12/86,445.78
  6. Step 6: Final answer
    x = 104,069.99

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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.