Home / 142,285.50-196,336.98-78,614.64

Finding the Fourth Proportional to 142,285.50, 196,336.98 and 78,614.64

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Solution

The fourth proportional to 142,285.50, 196,336.98 and 78,614.64 is: 108,478.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,285.50 : 196,336.98 = 78,614.64 : x
  2. Step 2: Convert to fraction form
    142,285.50/196,336.98 = 78,614.64/x
  3. Step 3: Cross multiply
    142,285.50x = 196,336.98 × 78,614.64
  4. Step 4: Simplify right side
    142,285.50x = 15,434,961,001.39
  5. Step 5: Solve for x
    x = 15,434,961,001.39/142,285.50
  6. Step 6: Final answer
    x = 108,478.80

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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.