Home / 142,438.69-196,557.40-77,895.10

Finding the Fourth Proportional to 142,438.69, 196,557.40 and 77,895.10

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Solution

The fourth proportional to 142,438.69, 196,557.40 and 77,895.10 is: 107,490.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,438.69 : 196,557.40 = 77,895.10 : x
  2. Step 2: Convert to fraction form
    142,438.69/196,557.40 = 77,895.10/x
  3. Step 3: Cross multiply
    142,438.69x = 196,557.40 × 77,895.10
  4. Step 4: Simplify right side
    142,438.69x = 15,310,858,328.74
  5. Step 5: Solve for x
    x = 15,310,858,328.74/142,438.69
  6. Step 6: Final answer
    x = 107,490.87

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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.