Home / 142,039.63-196,008.96-78,376.60

Finding the Fourth Proportional to 142,039.63, 196,008.96 and 78,376.60

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Solution

The fourth proportional to 142,039.63, 196,008.96 and 78,376.60 is: 108,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,039.63 : 196,008.96 = 78,376.60 : x
  2. Step 2: Convert to fraction form
    142,039.63/196,008.96 = 78,376.60/x
  3. Step 3: Cross multiply
    142,039.63x = 196,008.96 × 78,376.60
  4. Step 4: Simplify right side
    142,039.63x = 15,362,515,854.34
  5. Step 5: Solve for x
    x = 15,362,515,854.34/142,039.63
  6. Step 6: Final answer
    x = 108,156.55

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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.