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Finding the Fourth Proportional to 117,320.32, 161,859.60 and 77,055.92

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Solution

The fourth proportional to 117,320.32, 161,859.60 and 77,055.92 is: 106,309.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,320.32 : 161,859.60 = 77,055.92 : x
  2. Step 2: Convert to fraction form
    117,320.32/161,859.60 = 77,055.92/x
  3. Step 3: Cross multiply
    117,320.32x = 161,859.60 × 77,055.92
  4. Step 4: Simplify right side
    117,320.32x = 12,472,240,388.83
  5. Step 5: Solve for x
    x = 12,472,240,388.83/117,320.32
  6. Step 6: Final answer
    x = 106,309.29

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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.