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Finding the Fourth Proportional to 92,986.63, 128,320.89 and 52,700.05

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Solution

The fourth proportional to 92,986.63, 128,320.89 and 52,700.05 is: 72,725.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,986.63 : 128,320.89 = 52,700.05 : x
  2. Step 2: Convert to fraction form
    92,986.63/128,320.89 = 52,700.05/x
  3. Step 3: Cross multiply
    92,986.63x = 128,320.89 × 52,700.05
  4. Step 4: Simplify right side
    92,986.63x = 6,762,517,319.04
  5. Step 5: Solve for x
    x = 6,762,517,319.04/92,986.63
  6. Step 6: Final answer
    x = 72,725.70

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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.