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Finding the Fourth Proportional to 55,071.78, 76,000.71 and 38,967.96

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Solution

The fourth proportional to 55,071.78, 76,000.71 and 38,967.96 is: 53,776.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,071.78 : 76,000.71 = 38,967.96 : x
  2. Step 2: Convert to fraction form
    55,071.78/76,000.71 = 38,967.96/x
  3. Step 3: Cross multiply
    55,071.78x = 76,000.71 × 38,967.96
  4. Step 4: Simplify right side
    55,071.78x = 2,961,592,627.25
  5. Step 5: Solve for x
    x = 2,961,592,627.25/55,071.78
  6. Step 6: Final answer
    x = 53,776.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.