Home / 142,555.50-196,718.40-78,889.50

Finding the Fourth Proportional to 142,555.50, 196,718.40 and 78,889.50

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Solution

The fourth proportional to 142,555.50, 196,718.40 and 78,889.50 is: 108,862.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,555.50 : 196,718.40 = 78,889.50 : x
  2. Step 2: Convert to fraction form
    142,555.50/196,718.40 = 78,889.50/x
  3. Step 3: Cross multiply
    142,555.50x = 196,718.40 × 78,889.50
  4. Step 4: Simplify right side
    142,555.50x = 15,519,016,216.80
  5. Step 5: Solve for x
    x = 15,519,016,216.80/142,555.50
  6. Step 6: Final answer
    x = 108,862.98

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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.