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Finding the Fourth Proportional to 121,299, 167,393.70 and 70,999.08

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Solution

The fourth proportional to 121,299, 167,393.70 and 70,999.08 is: 97,979.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,299 : 167,393.70 = 70,999.08 : x
  2. Step 2: Convert to fraction form
    121,299/167,393.70 = 70,999.08/x
  3. Step 3: Cross multiply
    121,299x = 167,393.70 × 70,999.08
  4. Step 4: Simplify right side
    121,299x = 11,884,798,697.80
  5. Step 5: Solve for x
    x = 11,884,798,697.80/121,299
  6. Step 6: Final answer
    x = 97,979.36

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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.