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Finding the Fourth Proportional to 71,458.85, 98,365.71 and 61,763.90

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Solution

The fourth proportional to 71,458.85, 98,365.71 and 61,763.90 is: 85,020.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,458.85 : 98,365.71 = 61,763.90 : x
  2. Step 2: Convert to fraction form
    71,458.85/98,365.71 = 61,763.90/x
  3. Step 3: Cross multiply
    71,458.85x = 98,365.71 × 61,763.90
  4. Step 4: Simplify right side
    71,458.85x = 6,075,449,384.04
  5. Step 5: Solve for x
    x = 6,075,449,384.04/71,458.85
  6. Step 6: Final answer
    x = 85,020.25

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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.