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Finding the Fourth Proportional to 130,963.60, 196,445.40 and 86,640.40

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Solution

The fourth proportional to 130,963.60, 196,445.40 and 86,640.40 is: 129,960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,963.60 : 196,445.40 = 86,640.40 : x
  2. Step 2: Convert to fraction form
    130,963.60/196,445.40 = 86,640.40/x
  3. Step 3: Cross multiply
    130,963.60x = 196,445.40 × 86,640.40
  4. Step 4: Simplify right side
    130,963.60x = 17,020,108,034.16
  5. Step 5: Solve for x
    x = 17,020,108,034.16/130,963.60
  6. Step 6: Final answer
    x = 129,960.60

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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.