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Finding the Fourth Proportional to 171,438.80, 257,158.20 and 53,109.20

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Solution

The fourth proportional to 171,438.80, 257,158.20 and 53,109.20 is: 79,663.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,438.80 : 257,158.20 = 53,109.20 : x
  2. Step 2: Convert to fraction form
    171,438.80/257,158.20 = 53,109.20/x
  3. Step 3: Cross multiply
    171,438.80x = 257,158.20 × 53,109.20
  4. Step 4: Simplify right side
    171,438.80x = 13,657,466,275.44
  5. Step 5: Solve for x
    x = 13,657,466,275.44/171,438.80
  6. Step 6: Final answer
    x = 79,663.80

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1.5x scale

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.