Home / 90,918.18-136,398.72-28,588.68

Finding the Fourth Proportional to 90,918.18, 136,398.72 and 28,588.68

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Solution

The fourth proportional to 90,918.18, 136,398.72 and 28,588.68 is: 42,889.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,918.18 : 136,398.72 = 28,588.68 : x
  2. Step 2: Convert to fraction form
    90,918.18/136,398.72 = 28,588.68/x
  3. Step 3: Cross multiply
    90,918.18x = 136,398.72 × 28,588.68
  4. Step 4: Simplify right side
    90,918.18x = 3,899,459,358.49
  5. Step 5: Solve for x
    x = 3,899,459,358.49/90,918.18
  6. Step 6: Final answer
    x = 42,889.76

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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.