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Finding the Fourth Proportional to 155,759.61, 214,948.34 and 84,139.61

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Solution

The fourth proportional to 155,759.61, 214,948.34 and 84,139.61 is: 116,112.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,759.61 : 214,948.34 = 84,139.61 : x
  2. Step 2: Convert to fraction form
    155,759.61/214,948.34 = 84,139.61/x
  3. Step 3: Cross multiply
    155,759.61x = 214,948.34 × 84,139.61
  4. Step 4: Simplify right side
    155,759.61x = 18,085,668,002.31
  5. Step 5: Solve for x
    x = 18,085,668,002.31/155,759.61
  6. Step 6: Final answer
    x = 116,112.69

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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.