Home / 212,909.10-293,849.67-128,072.94

Finding the Fourth Proportional to 212,909.10, 293,849.67 and 128,072.94

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Solution

The fourth proportional to 212,909.10, 293,849.67 and 128,072.94 is: 176,761.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,909.10 : 293,849.67 = 128,072.94 : x
  2. Step 2: Convert to fraction form
    212,909.10/293,849.67 = 128,072.94/x
  3. Step 3: Cross multiply
    212,909.10x = 293,849.67 × 128,072.94
  4. Step 4: Simplify right side
    212,909.10x = 37,634,191,154.93
  5. Step 5: Solve for x
    x = 37,634,191,154.93/212,909.10
  6. Step 6: Final answer
    x = 176,761.78

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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.