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Finding the Fourth Proportional to 109,353.57, 163,431.19 and 79,833.57

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Solution

The fourth proportional to 109,353.57, 163,431.19 and 79,833.57 is: 119,312.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,353.57 : 163,431.19 = 79,833.57 : x
  2. Step 2: Convert to fraction form
    109,353.57/163,431.19 = 79,833.57/x
  3. Step 3: Cross multiply
    109,353.57x = 163,431.19 × 79,833.57
  4. Step 4: Simplify right side
    109,353.57x = 13,047,294,947.88
  5. Step 5: Solve for x
    x = 13,047,294,947.88/109,353.57
  6. Step 6: Final answer
    x = 119,312.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.