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Finding the Fourth Proportional to 172,012.60, 257,975.70 and 61,178.68

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Solution

The fourth proportional to 172,012.60, 257,975.70 and 61,178.68 is: 91,752.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,012.60 : 257,975.70 = 61,178.68 : x
  2. Step 2: Convert to fraction form
    172,012.60/257,975.70 = 61,178.68/x
  3. Step 3: Cross multiply
    172,012.60x = 257,975.70 × 61,178.68
  4. Step 4: Simplify right side
    172,012.60x = 15,782,612,798.08
  5. Step 5: Solve for x
    x = 15,782,612,798.08/172,012.60
  6. Step 6: Final answer
    x = 91,752.66

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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.