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Finding the Fourth Proportional to 105,712.80, 158,374.80 and 98,714.40

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Solution

The fourth proportional to 105,712.80, 158,374.80 and 98,714.40 is: 147,890.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,712.80 : 158,374.80 = 98,714.40 : x
  2. Step 2: Convert to fraction form
    105,712.80/158,374.80 = 98,714.40/x
  3. Step 3: Cross multiply
    105,712.80x = 158,374.80 × 98,714.40
  4. Step 4: Simplify right side
    105,712.80x = 15,633,873,357.12
  5. Step 5: Solve for x
    x = 15,633,873,357.12/105,712.80
  6. Step 6: Final answer
    x = 147,890.07

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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.