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Finding the Fourth Proportional to 64,490.74, 89,001.21 and 42,943.54

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Solution

The fourth proportional to 64,490.74, 89,001.21 and 42,943.54 is: 59,264.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,490.74 : 89,001.21 = 42,943.54 : x
  2. Step 2: Convert to fraction form
    64,490.74/89,001.21 = 42,943.54/x
  3. Step 3: Cross multiply
    64,490.74x = 89,001.21 × 42,943.54
  4. Step 4: Simplify right side
    64,490.74x = 3,822,027,021.68
  5. Step 5: Solve for x
    x = 3,822,027,021.68/64,490.74
  6. Step 6: Final answer
    x = 59,264.74

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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.