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Finding the Fourth Proportional to 103,665.40, 155,382.90 and 56,951.80

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Solution

The fourth proportional to 103,665.40, 155,382.90 and 56,951.80 is: 85,364.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,665.40 : 155,382.90 = 56,951.80 : x
  2. Step 2: Convert to fraction form
    103,665.40/155,382.90 = 56,951.80/x
  3. Step 3: Cross multiply
    103,665.40x = 155,382.90 × 56,951.80
  4. Step 4: Simplify right side
    103,665.40x = 8,849,335,844.22
  5. Step 5: Solve for x
    x = 8,849,335,844.22/103,665.40
  6. Step 6: Final answer
    x = 85,364.41

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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.