Home / 131,688.86-181,731.73-77,273.57

Finding the Fourth Proportional to 131,688.86, 181,731.73 and 77,273.57

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Solution

The fourth proportional to 131,688.86, 181,731.73 and 77,273.57 is: 106,638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,688.86 : 181,731.73 = 77,273.57 : x
  2. Step 2: Convert to fraction form
    131,688.86/181,731.73 = 77,273.57/x
  3. Step 3: Cross multiply
    131,688.86x = 181,731.73 × 77,273.57
  4. Step 4: Simplify right side
    131,688.86x = 14,043,059,820.52
  5. Step 5: Solve for x
    x = 14,043,059,820.52/131,688.86
  6. Step 6: Final answer
    x = 106,638.17

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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.