Home / 90,785.13-136,199.56-28,455.63

Finding the Fourth Proportional to 90,785.13, 136,199.56 and 28,455.63

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Solution

The fourth proportional to 90,785.13, 136,199.56 and 28,455.63 is: 42,690.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,785.13 : 136,199.56 = 28,455.63 : x
  2. Step 2: Convert to fraction form
    90,785.13/136,199.56 = 28,455.63/x
  3. Step 3: Cross multiply
    90,785.13x = 136,199.56 × 28,455.63
  4. Step 4: Simplify right side
    90,785.13x = 3,875,644,285.52
  5. Step 5: Solve for x
    x = 3,875,644,285.52/90,785.13
  6. Step 6: Final answer
    x = 42,690.30

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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.