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Finding the Fourth Proportional to 105,518.40, 158,666.40 and 88,411.20

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Solution

The fourth proportional to 105,518.40, 158,666.40 and 88,411.20 is: 132,942.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,518.40 : 158,666.40 = 88,411.20 : x
  2. Step 2: Convert to fraction form
    105,518.40/158,666.40 = 88,411.20/x
  3. Step 3: Cross multiply
    105,518.40x = 158,666.40 × 88,411.20
  4. Step 4: Simplify right side
    105,518.40x = 14,027,886,823.68
  5. Step 5: Solve for x
    x = 14,027,886,823.68/105,518.40
  6. Step 6: Final answer
    x = 132,942.57

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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.