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Finding the Fourth Proportional to 105,511.92, 145,600.92 and 57,756.12

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Solution

The fourth proportional to 105,511.92, 145,600.92 and 57,756.12 is: 79,700.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,511.92 : 145,600.92 = 57,756.12 : x
  2. Step 2: Convert to fraction form
    105,511.92/145,600.92 = 57,756.12/x
  3. Step 3: Cross multiply
    105,511.92x = 145,600.92 × 57,756.12
  4. Step 4: Simplify right side
    105,511.92x = 8,409,344,207.63
  5. Step 5: Solve for x
    x = 8,409,344,207.63/105,511.92
  6. Step 6: Final answer
    x = 79,700.42

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1.5x scale

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.