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Finding the Fourth Proportional to 121,706.52, 167,949 and 67,980.84

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Solution

The fourth proportional to 121,706.52, 167,949 and 67,980.84 is: 93,810.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,706.52 : 167,949 = 67,980.84 : x
  2. Step 2: Convert to fraction form
    121,706.52/167,949 = 67,980.84/x
  3. Step 3: Cross multiply
    121,706.52x = 167,949 × 67,980.84
  4. Step 4: Simplify right side
    121,706.52x = 11,417,314,097.16
  5. Step 5: Solve for x
    x = 11,417,314,097.16/121,706.52
  6. Step 6: Final answer
    x = 93,810.21

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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.