Home / 78,436.52-117,669.36-25,849.70

Finding the Fourth Proportional to 78,436.52, 117,669.36 and 25,849.70

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Solution

The fourth proportional to 78,436.52, 117,669.36 and 25,849.70 is: 38,779.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,436.52 : 117,669.36 = 25,849.70 : x
  2. Step 2: Convert to fraction form
    78,436.52/117,669.36 = 25,849.70/x
  3. Step 3: Cross multiply
    78,436.52x = 117,669.36 × 25,849.70
  4. Step 4: Simplify right side
    78,436.52x = 3,041,717,655.19
  5. Step 5: Solve for x
    x = 3,041,717,655.19/78,436.52
  6. Step 6: Final answer
    x = 38,779.36

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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.