Home / 121,178.52-167,253.93-78,663.24

Finding the Fourth Proportional to 121,178.52, 167,253.93 and 78,663.24

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Solution

The fourth proportional to 121,178.52, 167,253.93 and 78,663.24 is: 108,573.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,178.52 : 167,253.93 = 78,663.24 : x
  2. Step 2: Convert to fraction form
    121,178.52/167,253.93 = 78,663.24/x
  3. Step 3: Cross multiply
    121,178.52x = 167,253.93 × 78,663.24
  4. Step 4: Simplify right side
    121,178.52x = 13,156,736,036.53
  5. Step 5: Solve for x
    x = 13,156,736,036.53/121,178.52
  6. Step 6: Final answer
    x = 108,573.17

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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.