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Finding the Fourth Proportional to 155,894.84, 215,118.76 and 115,080.65

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Solution

The fourth proportional to 155,894.84, 215,118.76 and 115,080.65 is: 158,799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,894.84 : 215,118.76 = 115,080.65 : x
  2. Step 2: Convert to fraction form
    155,894.84/215,118.76 = 115,080.65/x
  3. Step 3: Cross multiply
    155,894.84x = 215,118.76 × 115,080.65
  4. Step 4: Simplify right side
    155,894.84x = 24,756,006,978.09
  5. Step 5: Solve for x
    x = 24,756,006,978.09/155,894.84
  6. Step 6: Final answer
    x = 158,799.40

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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.