Home / 131,485.68-181,436.85-77,760.20

Finding the Fourth Proportional to 131,485.68, 181,436.85 and 77,760.20

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Solution

The fourth proportional to 131,485.68, 181,436.85 and 77,760.20 is: 107,301.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,485.68 : 181,436.85 = 77,760.20 : x
  2. Step 2: Convert to fraction form
    131,485.68/181,436.85 = 77,760.20/x
  3. Step 3: Cross multiply
    131,485.68x = 181,436.85 × 77,760.20
  4. Step 4: Simplify right side
    131,485.68x = 14,108,566,196.96
  5. Step 5: Solve for x
    x = 14,108,566,196.96/131,485.68
  6. Step 6: Final answer
    x = 107,301.16

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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.