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Finding the Fourth Proportional to 171,030.60, 256,545.90 and 139,537.80

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Solution

The fourth proportional to 171,030.60, 256,545.90 and 139,537.80 is: 209,306.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,030.60 : 256,545.90 = 139,537.80 : x
  2. Step 2: Convert to fraction form
    171,030.60/256,545.90 = 139,537.80/x
  3. Step 3: Cross multiply
    171,030.60x = 256,545.90 × 139,537.80
  4. Step 4: Simplify right side
    171,030.60x = 35,797,850,485.02
  5. Step 5: Solve for x
    x = 35,797,850,485.02/171,030.60
  6. Step 6: Final answer
    x = 209,306.70

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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.