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Finding the Fourth Proportional to 103,330.94, 155,000.20 and 28,456.88

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Solution

The fourth proportional to 103,330.94, 155,000.20 and 28,456.88 is: 42,686.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,330.94 : 155,000.20 = 28,456.88 : x
  2. Step 2: Convert to fraction form
    103,330.94/155,000.20 = 28,456.88/x
  3. Step 3: Cross multiply
    103,330.94x = 155,000.20 × 28,456.88
  4. Step 4: Simplify right side
    103,330.94x = 4,410,822,091.38
  5. Step 5: Solve for x
    x = 4,410,822,091.38/103,330.94
  6. Step 6: Final answer
    x = 42,686.36

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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.