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Finding the Fourth Proportional to 218,802.45, 328,174.52 and 61,017.69

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Solution

The fourth proportional to 218,802.45, 328,174.52 and 61,017.69 is: 91,518.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,802.45 : 328,174.52 = 61,017.69 : x
  2. Step 2: Convert to fraction form
    218,802.45/328,174.52 = 61,017.69/x
  3. Step 3: Cross multiply
    218,802.45x = 328,174.52 × 61,017.69
  4. Step 4: Simplify right side
    218,802.45x = 20,024,450,822.17
  5. Step 5: Solve for x
    x = 20,024,450,822.17/218,802.45
  6. Step 6: Final answer
    x = 91,518.40

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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.