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Finding the Fourth Proportional to 64,480, 88,992.12 and 39,344.08

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Solution

The fourth proportional to 64,480, 88,992.12 and 39,344.08 is: 54,300.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,480 : 88,992.12 = 39,344.08 : x
  2. Step 2: Convert to fraction form
    64,480/88,992.12 = 39,344.08/x
  3. Step 3: Cross multiply
    64,480x = 88,992.12 × 39,344.08
  4. Step 4: Simplify right side
    64,480x = 3,501,313,088.65
  5. Step 5: Solve for x
    x = 3,501,313,088.65/64,480
  6. Step 6: Final answer
    x = 54,300.76

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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.