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Finding the Fourth Proportional to 207,319.61, 310,782.38 and 81,040.82

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Solution

The fourth proportional to 207,319.61, 310,782.38 and 81,040.82 is: 121,484.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,319.61 : 310,782.38 = 81,040.82 : x
  2. Step 2: Convert to fraction form
    207,319.61/310,782.38 = 81,040.82/x
  3. Step 3: Cross multiply
    207,319.61x = 310,782.38 × 81,040.82
  4. Step 4: Simplify right side
    207,319.61x = 25,186,056,957.64
  5. Step 5: Solve for x
    x = 25,186,056,957.64/207,319.61
  6. Step 6: Final answer
    x = 121,484.20

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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.