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Finding the Fourth Proportional to 171,659.70, 257,513.85 and 53,318.70

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Solution

The fourth proportional to 171,659.70, 257,513.85 and 53,318.70 is: 79,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,659.70 : 257,513.85 = 53,318.70 : x
  2. Step 2: Convert to fraction form
    171,659.70/257,513.85 = 53,318.70/x
  3. Step 3: Cross multiply
    171,659.70x = 257,513.85 × 53,318.70
  4. Step 4: Simplify right side
    171,659.70x = 13,730,303,714.00
  5. Step 5: Solve for x
    x = 13,730,303,714.00/171,659.70
  6. Step 6: Final answer
    x = 79,985.60

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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.