Home / 155,931.39-215,176.48-87,944.30

Finding the Fourth Proportional to 155,931.39, 215,176.48 and 87,944.30

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Solution

The fourth proportional to 155,931.39, 215,176.48 and 87,944.30 is: 121,358.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,931.39 : 215,176.48 = 87,944.30 : x
  2. Step 2: Convert to fraction form
    155,931.39/215,176.48 = 87,944.30/x
  3. Step 3: Cross multiply
    155,931.39x = 215,176.48 × 87,944.30
  4. Step 4: Simplify right side
    155,931.39x = 18,923,544,845.75
  5. Step 5: Solve for x
    x = 18,923,544,845.75/155,931.39
  6. Step 6: Final answer
    x = 121,358.15

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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.