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Finding the Fourth Proportional to 64,775.81, 89,431.89 and 52,867.55

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Solution

The fourth proportional to 64,775.81, 89,431.89 and 52,867.55 is: 72,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,775.81 : 89,431.89 = 52,867.55 : x
  2. Step 2: Convert to fraction form
    64,775.81/89,431.89 = 52,867.55/x
  3. Step 3: Cross multiply
    64,775.81x = 89,431.89 × 52,867.55
  4. Step 4: Simplify right side
    64,775.81x = 4,728,044,916.17
  5. Step 5: Solve for x
    x = 4,728,044,916.17/64,775.81
  6. Step 6: Final answer
    x = 72,990.90

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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.