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Finding the Fourth Proportional to 128,244.87, 176,972.45 and 70,881.26

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Solution

The fourth proportional to 128,244.87, 176,972.45 and 70,881.26 is: 97,813.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,244.87 : 176,972.45 = 70,881.26 : x
  2. Step 2: Convert to fraction form
    128,244.87/176,972.45 = 70,881.26/x
  3. Step 3: Cross multiply
    128,244.87x = 176,972.45 × 70,881.26
  4. Step 4: Simplify right side
    128,244.87x = 12,544,029,002.02
  5. Step 5: Solve for x
    x = 12,544,029,002.02/128,244.87
  6. Step 6: Final answer
    x = 97,813.11

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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.