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Finding the Fourth Proportional to 142,563.36, 196,740.72 and 78,903.84

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Solution

The fourth proportional to 142,563.36, 196,740.72 and 78,903.84 is: 108,889.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,563.36 : 196,740.72 = 78,903.84 : x
  2. Step 2: Convert to fraction form
    142,563.36/196,740.72 = 78,903.84/x
  3. Step 3: Cross multiply
    142,563.36x = 196,740.72 × 78,903.84
  4. Step 4: Simplify right side
    142,563.36x = 15,523,598,292.36
  5. Step 5: Solve for x
    x = 15,523,598,292.36/142,563.36
  6. Step 6: Final answer
    x = 108,889.12

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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.