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Finding the Fourth Proportional to 84,017.66, 115,866.46 and 61,320.72

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Solution

The fourth proportional to 84,017.66, 115,866.46 and 61,320.72 is: 84,565.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,017.66 : 115,866.46 = 61,320.72 : x
  2. Step 2: Convert to fraction form
    84,017.66/115,866.46 = 61,320.72/x
  3. Step 3: Cross multiply
    84,017.66x = 115,866.46 × 61,320.72
  4. Step 4: Simplify right side
    84,017.66x = 7,105,014,393.20
  5. Step 5: Solve for x
    x = 7,105,014,393.20/84,017.66
  6. Step 6: Final answer
    x = 84,565.73

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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.