Home / 142,985.46-197,343.54-79,343.76

Finding the Fourth Proportional to 142,985.46, 197,343.54 and 79,343.76

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Solution

The fourth proportional to 142,985.46, 197,343.54 and 79,343.76 is: 109,507.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,985.46 : 197,343.54 = 79,343.76 : x
  2. Step 2: Convert to fraction form
    142,985.46/197,343.54 = 79,343.76/x
  3. Step 3: Cross multiply
    142,985.46x = 197,343.54 × 79,343.76
  4. Step 4: Simplify right side
    142,985.46x = 15,657,978,475.31
  5. Step 5: Solve for x
    x = 15,657,978,475.31/142,985.46
  6. Step 6: Final answer
    x = 109,507.49

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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.