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Finding the Fourth Proportional to 86,640.90, 130,004.55 and 49,229.70

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Solution

The fourth proportional to 86,640.90, 130,004.55 and 49,229.70 is: 73,869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,640.90 : 130,004.55 = 49,229.70 : x
  2. Step 2: Convert to fraction form
    86,640.90/130,004.55 = 49,229.70/x
  3. Step 3: Cross multiply
    86,640.90x = 130,004.55 × 49,229.70
  4. Step 4: Simplify right side
    86,640.90x = 6,400,084,995.14
  5. Step 5: Solve for x
    x = 6,400,084,995.14/86,640.90
  6. Step 6: Final answer
    x = 73,869.10

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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.