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Finding the Fourth Proportional to 155,858.68, 215,080.67 and 87,875.05

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Solution

The fourth proportional to 155,858.68, 215,080.67 and 87,875.05 is: 121,265.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,858.68 : 215,080.67 = 87,875.05 : x
  2. Step 2: Convert to fraction form
    155,858.68/215,080.67 = 87,875.05/x
  3. Step 3: Cross multiply
    155,858.68x = 215,080.67 × 87,875.05
  4. Step 4: Simplify right side
    155,858.68x = 18,900,224,826.16
  5. Step 5: Solve for x
    x = 18,900,224,826.16/155,858.68
  6. Step 6: Final answer
    x = 121,265.14

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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.