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Finding the Fourth Proportional to 75,146.95, 112,769.64 and 28,399.83

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Solution

The fourth proportional to 75,146.95, 112,769.64 and 28,399.83 is: 42,618.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,146.95 : 112,769.64 = 28,399.83 : x
  2. Step 2: Convert to fraction form
    75,146.95/112,769.64 = 28,399.83/x
  3. Step 3: Cross multiply
    75,146.95x = 112,769.64 × 28,399.83
  4. Step 4: Simplify right side
    75,146.95x = 3,202,638,605.16
  5. Step 5: Solve for x
    x = 3,202,638,605.16/75,146.95
  6. Step 6: Final answer
    x = 42,618.34

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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.