Home / 142,220.45-196,264.88-77,690.57

Finding the Fourth Proportional to 142,220.45, 196,264.88 and 77,690.57

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Solution

The fourth proportional to 142,220.45, 196,264.88 and 77,690.57 is: 107,213.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,220.45 : 196,264.88 = 77,690.57 : x
  2. Step 2: Convert to fraction form
    142,220.45/196,264.88 = 77,690.57/x
  3. Step 3: Cross multiply
    142,220.45x = 196,264.88 × 77,690.57
  4. Step 4: Simplify right side
    142,220.45x = 15,247,930,398.18
  5. Step 5: Solve for x
    x = 15,247,930,398.18/142,220.45
  6. Step 6: Final answer
    x = 107,213.35

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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.