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Finding the Fourth Proportional to 121,103.94, 180,880.80 and 109,688.74

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Solution

The fourth proportional to 121,103.94, 180,880.80 and 109,688.74 is: 163,831.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,103.94 : 180,880.80 = 109,688.74 : x
  2. Step 2: Convert to fraction form
    121,103.94/180,880.80 = 109,688.74/x
  3. Step 3: Cross multiply
    121,103.94x = 180,880.80 × 109,688.74
  4. Step 4: Simplify right side
    121,103.94x = 19,840,587,042.19
  5. Step 5: Solve for x
    x = 19,840,587,042.19/121,103.94
  6. Step 6: Final answer
    x = 163,831.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.