Home / 90,320.62-135,480.32-70,615.76

Finding the Fourth Proportional to 90,320.62, 135,480.32 and 70,615.76

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Solution

The fourth proportional to 90,320.62, 135,480.32 and 70,615.76 is: 105,923.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,320.62 : 135,480.32 = 70,615.76 : x
  2. Step 2: Convert to fraction form
    90,320.62/135,480.32 = 70,615.76/x
  3. Step 3: Cross multiply
    90,320.62x = 135,480.32 × 70,615.76
  4. Step 4: Simplify right side
    90,320.62x = 9,567,045,761.84
  5. Step 5: Solve for x
    x = 9,567,045,761.84/90,320.62
  6. Step 6: Final answer
    x = 105,923.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.