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Finding the Fourth Proportional to 64,885.68, 89,548.44 and 39,386.20

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Solution

The fourth proportional to 64,885.68, 89,548.44 and 39,386.20 is: 54,356.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,885.68 : 89,548.44 = 39,386.20 : x
  2. Step 2: Convert to fraction form
    64,885.68/89,548.44 = 39,386.20/x
  3. Step 3: Cross multiply
    64,885.68x = 89,548.44 × 39,386.20
  4. Step 4: Simplify right side
    64,885.68x = 3,526,972,563.86
  5. Step 5: Solve for x
    x = 3,526,972,563.86/64,885.68
  6. Step 6: Final answer
    x = 54,356.71

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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.