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Finding the Fourth Proportional to 92,981.43, 128,313.86 and 52,702.81

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Solution

The fourth proportional to 92,981.43, 128,313.86 and 52,702.81 is: 72,729.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,981.43 : 128,313.86 = 52,702.81 : x
  2. Step 2: Convert to fraction form
    92,981.43/128,313.86 = 52,702.81/x
  3. Step 3: Cross multiply
    92,981.43x = 128,313.86 × 52,702.81
  4. Step 4: Simplify right side
    92,981.43x = 6,762,500,399.65
  5. Step 5: Solve for x
    x = 6,762,500,399.65/92,981.43
  6. Step 6: Final answer
    x = 72,729.58

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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.