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Finding the Fourth Proportional to 131,275.70, 196,913.55 and 78,658.10

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Solution

The fourth proportional to 131,275.70, 196,913.55 and 78,658.10 is: 117,987.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,275.70 : 196,913.55 = 78,658.10 : x
  2. Step 2: Convert to fraction form
    131,275.70/196,913.55 = 78,658.10/x
  3. Step 3: Cross multiply
    131,275.70x = 196,913.55 × 78,658.10
  4. Step 4: Simplify right side
    131,275.70x = 15,488,845,707.26
  5. Step 5: Solve for x
    x = 15,488,845,707.26/131,275.70
  6. Step 6: Final answer
    x = 117,987.15

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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.