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Finding the Fourth Proportional to 155,243.70, 214,254.17 and 86,340.16

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Solution

The fourth proportional to 155,243.70, 214,254.17 and 86,340.16 is: 119,159.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,243.70 : 214,254.17 = 86,340.16 : x
  2. Step 2: Convert to fraction form
    155,243.70/214,254.17 = 86,340.16/x
  3. Step 3: Cross multiply
    155,243.70x = 214,254.17 × 86,340.16
  4. Step 4: Simplify right side
    155,243.70x = 18,498,739,318.47
  5. Step 5: Solve for x
    x = 18,498,739,318.47/155,243.70
  6. Step 6: Final answer
    x = 119,159.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.