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Finding the Fourth Proportional to 64,646.66, 89,210.60 and 39,168.11

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Solution

The fourth proportional to 64,646.66, 89,210.60 and 39,168.11 is: 54,050.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,646.66 : 89,210.60 = 39,168.11 : x
  2. Step 2: Convert to fraction form
    64,646.66/89,210.60 = 39,168.11/x
  3. Step 3: Cross multiply
    64,646.66x = 89,210.60 × 39,168.11
  4. Step 4: Simplify right side
    64,646.66x = 3,494,210,768.03
  5. Step 5: Solve for x
    x = 3,494,210,768.03/64,646.66
  6. Step 6: Final answer
    x = 54,050.91

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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.