Home / 131,868.81-181,975.17-77,420.07

Finding the Fourth Proportional to 131,868.81, 181,975.17 and 77,420.07

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Solution

The fourth proportional to 131,868.81, 181,975.17 and 77,420.07 is: 106,837.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,868.81 : 181,975.17 = 77,420.07 : x
  2. Step 2: Convert to fraction form
    131,868.81/181,975.17 = 77,420.07/x
  3. Step 3: Cross multiply
    131,868.81x = 181,975.17 × 77,420.07
  4. Step 4: Simplify right side
    131,868.81x = 14,088,530,689.99
  5. Step 5: Solve for x
    x = 14,088,530,689.99/131,868.81
  6. Step 6: Final answer
    x = 106,837.47

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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.