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Finding the Fourth Proportional to 148,776.95, 205,452.30 and 103,578.51

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Solution

The fourth proportional to 148,776.95, 205,452.30 and 103,578.51 is: 143,035.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,776.95 : 205,452.30 = 103,578.51 : x
  2. Step 2: Convert to fraction form
    148,776.95/205,452.30 = 103,578.51/x
  3. Step 3: Cross multiply
    148,776.95x = 205,452.30 × 103,578.51
  4. Step 4: Simplify right side
    148,776.95x = 21,280,443,110.07
  5. Step 5: Solve for x
    x = 21,280,443,110.07/148,776.95
  6. Step 6: Final answer
    x = 143,035.89

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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.