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Finding the Fourth Proportional to 71,616.63, 98,831.07 and 39,785.55

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Solution

The fourth proportional to 71,616.63, 98,831.07 and 39,785.55 is: 54,904.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,616.63 : 98,831.07 = 39,785.55 : x
  2. Step 2: Convert to fraction form
    71,616.63/98,831.07 = 39,785.55/x
  3. Step 3: Cross multiply
    71,616.63x = 98,831.07 × 39,785.55
  4. Step 4: Simplify right side
    71,616.63x = 3,932,048,477.04
  5. Step 5: Solve for x
    x = 3,932,048,477.04/71,616.63
  6. Step 6: Final answer
    x = 54,904.13

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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.