Home / 126,678.42-189,639-76,607.10

Finding the Fourth Proportional to 126,678.42, 189,639 and 76,607.10

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Solution

The fourth proportional to 126,678.42, 189,639 and 76,607.10 is: 114,681.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,678.42 : 189,639 = 76,607.10 : x
  2. Step 2: Convert to fraction form
    126,678.42/189,639 = 76,607.10/x
  3. Step 3: Cross multiply
    126,678.42x = 189,639 × 76,607.10
  4. Step 4: Simplify right side
    126,678.42x = 14,527,693,836.90
  5. Step 5: Solve for x
    x = 14,527,693,836.90/126,678.42
  6. Step 6: Final answer
    x = 114,681.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.