Home / 142,208.42-196,248.81-78,547.28

Finding the Fourth Proportional to 142,208.42, 196,248.81 and 78,547.28

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Solution

The fourth proportional to 142,208.42, 196,248.81 and 78,547.28 is: 108,395.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,208.42 : 196,248.81 = 78,547.28 : x
  2. Step 2: Convert to fraction form
    142,208.42/196,248.81 = 78,547.28/x
  3. Step 3: Cross multiply
    142,208.42x = 196,248.81 × 78,547.28
  4. Step 4: Simplify right side
    142,208.42x = 15,414,809,247.49
  5. Step 5: Solve for x
    x = 15,414,809,247.49/142,208.42
  6. Step 6: Final answer
    x = 108,395.90

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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.