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Finding the Fourth Proportional to 121,719.61, 167,980.96 and 68,004.93

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Solution

The fourth proportional to 121,719.61, 167,980.96 and 68,004.93 is: 93,851.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,719.61 : 167,980.96 = 68,004.93 : x
  2. Step 2: Convert to fraction form
    121,719.61/167,980.96 = 68,004.93/x
  3. Step 3: Cross multiply
    121,719.61x = 167,980.96 × 68,004.93
  4. Step 4: Simplify right side
    121,719.61x = 11,423,533,426.13
  5. Step 5: Solve for x
    x = 11,423,533,426.13/121,719.61
  6. Step 6: Final answer
    x = 93,851.22

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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.