Home / 142,788.54-197,049.36-79,127.40

Finding the Fourth Proportional to 142,788.54, 197,049.36 and 79,127.40

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Solution

The fourth proportional to 142,788.54, 197,049.36 and 79,127.40 is: 109,196.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,788.54 : 197,049.36 = 79,127.40 : x
  2. Step 2: Convert to fraction form
    142,788.54/197,049.36 = 79,127.40/x
  3. Step 3: Cross multiply
    142,788.54x = 197,049.36 × 79,127.40
  4. Step 4: Simplify right side
    142,788.54x = 15,592,003,528.46
  5. Step 5: Solve for x
    x = 15,592,003,528.46/142,788.54
  6. Step 6: Final answer
    x = 109,196.46

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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.