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Finding the Fourth Proportional to 315,637.72, 473,457.84 and 78,979.72

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Solution

The fourth proportional to 315,637.72, 473,457.84 and 78,979.72 is: 118,469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,637.72 : 473,457.84 = 78,979.72 : x
  2. Step 2: Convert to fraction form
    315,637.72/473,457.84 = 78,979.72/x
  3. Step 3: Cross multiply
    315,637.72x = 473,457.84 × 78,979.72
  4. Step 4: Simplify right side
    315,637.72x = 37,393,567,635.00
  5. Step 5: Solve for x
    x = 37,393,567,635.00/315,637.72
  6. Step 6: Final answer
    x = 118,469.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.