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Finding the Fourth Proportional to 67,000.04, 100,484.71 and 39,990

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Solution

The fourth proportional to 67,000.04, 100,484.71 and 39,990 is: 59,975.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,000.04 : 100,484.71 = 39,990 : x
  2. Step 2: Convert to fraction form
    67,000.04/100,484.71 = 39,990/x
  3. Step 3: Cross multiply
    67,000.04x = 100,484.71 × 39,990
  4. Step 4: Simplify right side
    67,000.04x = 4,018,383,602.89
  5. Step 5: Solve for x
    x = 4,018,383,602.89/67,000.04
  6. Step 6: Final answer
    x = 59,975.84

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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.