Home / 142,943.40-197,252.28-79,278.84

Finding the Fourth Proportional to 142,943.40, 197,252.28 and 79,278.84

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Solution

The fourth proportional to 142,943.40, 197,252.28 and 79,278.84 is: 109,399.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,943.40 : 197,252.28 = 79,278.84 : x
  2. Step 2: Convert to fraction form
    142,943.40/197,252.28 = 79,278.84/x
  3. Step 3: Cross multiply
    142,943.40x = 197,252.28 × 79,278.84
  4. Step 4: Simplify right side
    142,943.40x = 15,637,931,945.76
  5. Step 5: Solve for x
    x = 15,637,931,945.76/142,943.40
  6. Step 6: Final answer
    x = 109,399.47

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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.