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Finding the Fourth Proportional to 90,498.74, 135,748.10 and 28,174.10

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Solution

The fourth proportional to 90,498.74, 135,748.10 and 28,174.10 is: 42,261.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,498.74 : 135,748.10 = 28,174.10 : x
  2. Step 2: Convert to fraction form
    90,498.74/135,748.10 = 28,174.10/x
  3. Step 3: Cross multiply
    90,498.74x = 135,748.10 × 28,174.10
  4. Step 4: Simplify right side
    90,498.74x = 3,824,579,935.90
  5. Step 5: Solve for x
    x = 3,824,579,935.90/90,498.74
  6. Step 6: Final answer
    x = 42,261.14

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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.