Home / 142,344.84-196,427.34-78,678.84

Finding the Fourth Proportional to 142,344.84, 196,427.34 and 78,678.84

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Solution

The fourth proportional to 142,344.84, 196,427.34 and 78,678.84 is: 108,572.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,344.84 : 196,427.34 = 78,678.84 : x
  2. Step 2: Convert to fraction form
    142,344.84/196,427.34 = 78,678.84/x
  3. Step 3: Cross multiply
    142,344.84x = 196,427.34 × 78,678.84
  4. Step 4: Simplify right side
    142,344.84x = 15,454,675,255.49
  5. Step 5: Solve for x
    x = 15,454,675,255.49/142,344.84
  6. Step 6: Final answer
    x = 108,572.08

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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.