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Finding the Fourth Proportional to 155,422.07, 214,482.10 and 87,439.07

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Solution

The fourth proportional to 155,422.07, 214,482.10 and 87,439.07 is: 120,665.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,422.07 : 214,482.10 = 87,439.07 : x
  2. Step 2: Convert to fraction form
    155,422.07/214,482.10 = 87,439.07/x
  3. Step 3: Cross multiply
    155,422.07x = 214,482.10 × 87,439.07
  4. Step 4: Simplify right side
    155,422.07x = 18,754,115,355.65
  5. Step 5: Solve for x
    x = 18,754,115,355.65/155,422.07
  6. Step 6: Final answer
    x = 120,665.72

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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.