Home / 155,859.08-215,081.22-87,875.47

Finding the Fourth Proportional to 155,859.08, 215,081.22 and 87,875.47

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Solution

The fourth proportional to 155,859.08, 215,081.22 and 87,875.47 is: 121,265.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,859.08 : 215,081.22 = 87,875.47 : x
  2. Step 2: Convert to fraction form
    155,859.08/215,081.22 = 87,875.47/x
  3. Step 3: Cross multiply
    155,859.08x = 215,081.22 × 87,875.47
  4. Step 4: Simplify right side
    155,859.08x = 18,900,363,295.67
  5. Step 5: Solve for x
    x = 18,900,363,295.67/155,859.08
  6. Step 6: Final answer
    x = 121,265.72

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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.