Home / 131,486.34-181,488.33-77,790.12

Finding the Fourth Proportional to 131,486.34, 181,488.33 and 77,790.12

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Solution

The fourth proportional to 131,486.34, 181,488.33 and 77,790.12 is: 107,372.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,486.34 : 181,488.33 = 77,790.12 : x
  2. Step 2: Convert to fraction form
    131,486.34/181,488.33 = 77,790.12/x
  3. Step 3: Cross multiply
    131,486.34x = 181,488.33 × 77,790.12
  4. Step 4: Simplify right side
    131,486.34x = 14,117,998,969.30
  5. Step 5: Solve for x
    x = 14,117,998,969.30/131,486.34
  6. Step 6: Final answer
    x = 107,372.36

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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.