Home / 121,916.52-168,278.60-70,939.08

Finding the Fourth Proportional to 121,916.52, 168,278.60 and 70,939.08

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Solution

The fourth proportional to 121,916.52, 168,278.60 and 70,939.08 is: 97,915.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,916.52 : 168,278.60 = 70,939.08 : x
  2. Step 2: Convert to fraction form
    121,916.52/168,278.60 = 70,939.08/x
  3. Step 3: Cross multiply
    121,916.52x = 168,278.60 × 70,939.08
  4. Step 4: Simplify right side
    121,916.52x = 11,937,529,067.69
  5. Step 5: Solve for x
    x = 11,937,529,067.69/121,916.52
  6. Step 6: Final answer
    x = 97,915.60

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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.