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Finding the Fourth Proportional to 205,541.80, 308,312.70 and 100,565.80

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Solution

The fourth proportional to 205,541.80, 308,312.70 and 100,565.80 is: 150,848.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,541.80 : 308,312.70 = 100,565.80 : x
  2. Step 2: Convert to fraction form
    205,541.80/308,312.70 = 100,565.80/x
  3. Step 3: Cross multiply
    205,541.80x = 308,312.70 × 100,565.80
  4. Step 4: Simplify right side
    205,541.80x = 31,005,713,325.66
  5. Step 5: Solve for x
    x = 31,005,713,325.66/205,541.80
  6. Step 6: Final answer
    x = 150,848.70

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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.