Home / 131,445.60-196,909.20-78,698.40

Finding the Fourth Proportional to 131,445.60, 196,909.20 and 78,698.40

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Solution

The fourth proportional to 131,445.60, 196,909.20 and 78,698.40 is: 117,892.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,445.60 : 196,909.20 = 78,698.40 : x
  2. Step 2: Convert to fraction form
    131,445.60/196,909.20 = 78,698.40/x
  3. Step 3: Cross multiply
    131,445.60x = 196,909.20 × 78,698.40
  4. Step 4: Simplify right side
    131,445.60x = 15,496,438,985.28
  5. Step 5: Solve for x
    x = 15,496,438,985.28/131,445.60
  6. Step 6: Final answer
    x = 117,892.41

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1.5x scale

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.