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Finding the Fourth Proportional to 105,315.20, 157,972.80 and 104,659.10

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Solution

The fourth proportional to 105,315.20, 157,972.80 and 104,659.10 is: 156,988.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,315.20 : 157,972.80 = 104,659.10 : x
  2. Step 2: Convert to fraction form
    105,315.20/157,972.80 = 104,659.10/x
  3. Step 3: Cross multiply
    105,315.20x = 157,972.80 × 104,659.10
  4. Step 4: Simplify right side
    105,315.20x = 16,533,291,072.48
  5. Step 5: Solve for x
    x = 16,533,291,072.48/105,315.20
  6. Step 6: Final answer
    x = 156,988.65

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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.