Home / 142,038.30-196,008.15-78,376.14

Finding the Fourth Proportional to 142,038.30, 196,008.15 and 78,376.14

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Solution

The fourth proportional to 142,038.30, 196,008.15 and 78,376.14 is: 108,156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,038.30 : 196,008.15 = 78,376.14 : x
  2. Step 2: Convert to fraction form
    142,038.30/196,008.15 = 78,376.14/x
  3. Step 3: Cross multiply
    142,038.30x = 196,008.15 × 78,376.14
  4. Step 4: Simplify right side
    142,038.30x = 15,362,362,205.54
  5. Step 5: Solve for x
    x = 15,362,362,205.54/142,038.30
  6. Step 6: Final answer
    x = 108,156.48

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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.