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Finding the Fourth Proportional to 218,750.07, 328,159.53 and 76,638.81

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Solution

The fourth proportional to 218,750.07, 328,159.53 and 76,638.81 is: 114,970.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,750.07 : 328,159.53 = 76,638.81 : x
  2. Step 2: Convert to fraction form
    218,750.07/328,159.53 = 76,638.81/x
  3. Step 3: Cross multiply
    218,750.07x = 328,159.53 × 76,638.81
  4. Step 4: Simplify right side
    218,750.07x = 25,149,755,869.36
  5. Step 5: Solve for x
    x = 25,149,755,869.36/218,750.07
  6. Step 6: Final answer
    x = 114,970.28

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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.