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Finding the Fourth Proportional to 315,767.16, 473,639.88 and 79,111.92

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Solution

The fourth proportional to 315,767.16, 473,639.88 and 79,111.92 is: 118,665.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,767.16 : 473,639.88 = 79,111.92 : x
  2. Step 2: Convert to fraction form
    315,767.16/473,639.88 = 79,111.92/x
  3. Step 3: Cross multiply
    315,767.16x = 473,639.88 × 79,111.92
  4. Step 4: Simplify right side
    315,767.16x = 37,470,560,295.37
  5. Step 5: Solve for x
    x = 37,470,560,295.37/315,767.16
  6. Step 6: Final answer
    x = 118,665.16

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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.