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Finding the Fourth Proportional to 64,657.78, 89,206.95 and 39,156.01

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Solution

The fourth proportional to 64,657.78, 89,206.95 and 39,156.01 is: 54,022.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,657.78 : 89,206.95 = 39,156.01 : x
  2. Step 2: Convert to fraction form
    64,657.78/89,206.95 = 39,156.01/x
  3. Step 3: Cross multiply
    64,657.78x = 89,206.95 × 39,156.01
  4. Step 4: Simplify right side
    64,657.78x = 3,492,988,226.27
  5. Step 5: Solve for x
    x = 3,492,988,226.27/64,657.78
  6. Step 6: Final answer
    x = 54,022.71

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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.