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Finding the Fourth Proportional to 145,143.68, 200,296.52 and 81,479.84

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Solution

The fourth proportional to 145,143.68, 200,296.52 and 81,479.84 is: 112,441.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,143.68 : 200,296.52 = 81,479.84 : x
  2. Step 2: Convert to fraction form
    145,143.68/200,296.52 = 81,479.84/x
  3. Step 3: Cross multiply
    145,143.68x = 200,296.52 × 81,479.84
  4. Step 4: Simplify right side
    145,143.68x = 16,320,128,402.16
  5. Step 5: Solve for x
    x = 16,320,128,402.16/145,143.68
  6. Step 6: Final answer
    x = 112,441.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.