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Finding the Fourth Proportional to 121,809.65, 168,127.76 and 97,515.72

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Solution

The fourth proportional to 121,809.65, 168,127.76 and 97,515.72 is: 134,596.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,809.65 : 168,127.76 = 97,515.72 : x
  2. Step 2: Convert to fraction form
    121,809.65/168,127.76 = 97,515.72/x
  3. Step 3: Cross multiply
    121,809.65x = 168,127.76 × 97,515.72
  4. Step 4: Simplify right side
    121,809.65x = 16,395,099,812.18
  5. Step 5: Solve for x
    x = 16,395,099,812.18/121,809.65
  6. Step 6: Final answer
    x = 134,596.07

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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.