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Finding the Fourth Proportional to 64,981.78, 89,657.04 and 39,466.78

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Solution

The fourth proportional to 64,981.78, 89,657.04 and 39,466.78 is: 54,453.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,981.78 : 89,657.04 = 39,466.78 : x
  2. Step 2: Convert to fraction form
    64,981.78/89,657.04 = 39,466.78/x
  3. Step 3: Cross multiply
    64,981.78x = 89,657.04 × 39,466.78
  4. Step 4: Simplify right side
    64,981.78x = 3,538,474,673.13
  5. Step 5: Solve for x
    x = 3,538,474,673.13/64,981.78
  6. Step 6: Final answer
    x = 54,453.34

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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.