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Finding the Fourth Proportional to 84,020.66, 115,870.60 and 61,323.72

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Solution

The fourth proportional to 84,020.66, 115,870.60 and 61,323.72 is: 84,569.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,020.66 : 115,870.60 = 61,323.72 : x
  2. Step 2: Convert to fraction form
    84,020.66/115,870.60 = 61,323.72/x
  3. Step 3: Cross multiply
    84,020.66x = 115,870.60 × 61,323.72
  4. Step 4: Simplify right side
    84,020.66x = 7,105,616,230.63
  5. Step 5: Solve for x
    x = 7,105,616,230.63/84,020.66
  6. Step 6: Final answer
    x = 84,569.87

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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.