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Finding the Fourth Proportional to 171,430.60, 257,145.90 and 53,138.20

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Solution

The fourth proportional to 171,430.60, 257,145.90 and 53,138.20 is: 79,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,430.60 : 257,145.90 = 53,138.20 : x
  2. Step 2: Convert to fraction form
    171,430.60/257,145.90 = 53,138.20/x
  3. Step 3: Cross multiply
    171,430.60x = 257,145.90 × 53,138.20
  4. Step 4: Simplify right side
    171,430.60x = 13,664,270,263.38
  5. Step 5: Solve for x
    x = 13,664,270,263.38/171,430.60
  6. Step 6: Final answer
    x = 79,707.30

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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.