Home / 142,102.36-196,102.88-78,440.19

Finding the Fourth Proportional to 142,102.36, 196,102.88 and 78,440.19

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Solution

The fourth proportional to 142,102.36, 196,102.88 and 78,440.19 is: 108,248.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,102.36 : 196,102.88 = 78,440.19 : x
  2. Step 2: Convert to fraction form
    142,102.36/196,102.88 = 78,440.19/x
  3. Step 3: Cross multiply
    142,102.36x = 196,102.88 × 78,440.19
  4. Step 4: Simplify right side
    142,102.36x = 15,382,347,166.75
  5. Step 5: Solve for x
    x = 15,382,347,166.75/142,102.36
  6. Step 6: Final answer
    x = 108,248.36

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Double scale
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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.