Home / 142,111.36-196,110.48-78,455.20

Finding the Fourth Proportional to 142,111.36, 196,110.48 and 78,455.20

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Solution

The fourth proportional to 142,111.36, 196,110.48 and 78,455.20 is: 108,266.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,111.36 : 196,110.48 = 78,455.20 : x
  2. Step 2: Convert to fraction form
    142,111.36/196,110.48 = 78,455.20/x
  3. Step 3: Cross multiply
    142,111.36x = 196,110.48 × 78,455.20
  4. Step 4: Simplify right side
    142,111.36x = 15,385,886,930.50
  5. Step 5: Solve for x
    x = 15,385,886,930.50/142,111.36
  6. Step 6: Final answer
    x = 108,266.41

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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.