Home / 131,487.18-181,438.83-77,761.71

Finding the Fourth Proportional to 131,487.18, 181,438.83 and 77,761.71

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Solution

The fourth proportional to 131,487.18, 181,438.83 and 77,761.71 is: 107,303.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,487.18 : 181,438.83 = 77,761.71 : x
  2. Step 2: Convert to fraction form
    131,487.18/181,438.83 = 77,761.71/x
  3. Step 3: Cross multiply
    131,487.18x = 181,438.83 × 77,761.71
  4. Step 4: Simplify right side
    131,487.18x = 14,108,993,681.20
  5. Step 5: Solve for x
    x = 14,108,993,681.20/131,487.18
  6. Step 6: Final answer
    x = 107,303.19

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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.