Home / 142,376.70-196,483.94-78,718.59

Finding the Fourth Proportional to 142,376.70, 196,483.94 and 78,718.59

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Solution

The fourth proportional to 142,376.70, 196,483.94 and 78,718.59 is: 108,633.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,376.70 : 196,483.94 = 78,718.59 : x
  2. Step 2: Convert to fraction form
    142,376.70/196,483.94 = 78,718.59/x
  3. Step 3: Cross multiply
    142,376.70x = 196,483.94 × 78,718.59
  4. Step 4: Simplify right side
    142,376.70x = 15,466,938,714.44
  5. Step 5: Solve for x
    x = 15,466,938,714.44/142,376.70
  6. Step 6: Final answer
    x = 108,633.92

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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.