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Finding the Fourth Proportional to 127,643.75, 176,146.90 and 70,281.89

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Solution

The fourth proportional to 127,643.75, 176,146.90 and 70,281.89 is: 96,988.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,643.75 : 176,146.90 = 70,281.89 : x
  2. Step 2: Convert to fraction form
    127,643.75/176,146.90 = 70,281.89/x
  3. Step 3: Cross multiply
    127,643.75x = 176,146.90 × 70,281.89
  4. Step 4: Simplify right side
    127,643.75x = 12,379,936,653.75
  5. Step 5: Solve for x
    x = 12,379,936,653.75/127,643.75
  6. Step 6: Final answer
    x = 96,988.19

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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.