Home / 131,442.60-196,904.70-78,695.40

Finding the Fourth Proportional to 131,442.60, 196,904.70 and 78,695.40

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Solution

The fourth proportional to 131,442.60, 196,904.70 and 78,695.40 is: 117,887.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,442.60 : 196,904.70 = 78,695.40 : x
  2. Step 2: Convert to fraction form
    131,442.60/196,904.70 = 78,695.40/x
  3. Step 3: Cross multiply
    131,442.60x = 196,904.70 × 78,695.40
  4. Step 4: Simplify right side
    131,442.60x = 15,495,494,128.38
  5. Step 5: Solve for x
    x = 15,495,494,128.38/131,442.60
  6. Step 6: Final answer
    x = 117,887.92

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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.