Home / 143,420.49-197,925.39-78,894.81

Finding the Fourth Proportional to 143,420.49, 197,925.39 and 78,894.81

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Solution

The fourth proportional to 143,420.49, 197,925.39 and 78,894.81 is: 108,877.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,420.49 : 197,925.39 = 78,894.81 : x
  2. Step 2: Convert to fraction form
    143,420.49/197,925.39 = 78,894.81/x
  3. Step 3: Cross multiply
    143,420.49x = 197,925.39 × 78,894.81
  4. Step 4: Simplify right side
    143,420.49x = 15,615,286,038.23
  5. Step 5: Solve for x
    x = 15,615,286,038.23/143,420.49
  6. Step 6: Final answer
    x = 108,877.65

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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.