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Finding the Fourth Proportional to 185,703.17, 256,267.87 and 105,128.62

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Solution

The fourth proportional to 185,703.17, 256,267.87 and 105,128.62 is: 145,076.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,703.17 : 256,267.87 = 105,128.62 : x
  2. Step 2: Convert to fraction form
    185,703.17/256,267.87 = 105,128.62/x
  3. Step 3: Cross multiply
    185,703.17x = 256,267.87 × 105,128.62
  4. Step 4: Simplify right side
    185,703.17x = 26,941,086,619.95
  5. Step 5: Solve for x
    x = 26,941,086,619.95/185,703.17
  6. Step 6: Final answer
    x = 145,076.08

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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.