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Finding the Fourth Proportional to 64,878.64, 89,517.24 and 39,384.38

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Solution

The fourth proportional to 64,878.64, 89,517.24 and 39,384.38 is: 54,341.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,878.64 : 89,517.24 = 39,384.38 : x
  2. Step 2: Convert to fraction form
    64,878.64/89,517.24 = 39,384.38/x
  3. Step 3: Cross multiply
    64,878.64x = 89,517.24 × 39,384.38
  4. Step 4: Simplify right side
    64,878.64x = 3,525,580,996.71
  5. Step 5: Solve for x
    x = 3,525,580,996.71/64,878.64
  6. Step 6: Final answer
    x = 54,341.17

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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.