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Finding the Fourth Proportional to 43,681.68, 65,411.35 and 28,868.40

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Solution

The fourth proportional to 43,681.68, 65,411.35 and 28,868.40 is: 43,229.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,681.68 : 65,411.35 = 28,868.40 : x
  2. Step 2: Convert to fraction form
    43,681.68/65,411.35 = 28,868.40/x
  3. Step 3: Cross multiply
    43,681.68x = 65,411.35 × 28,868.40
  4. Step 4: Simplify right side
    43,681.68x = 1,888,320,944.17
  5. Step 5: Solve for x
    x = 1,888,320,944.17/43,681.68
  6. Step 6: Final answer
    x = 43,229.13

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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.