Home / 138,872.79-191,643.98-75,210.57

Finding the Fourth Proportional to 138,872.79, 191,643.98 and 75,210.57

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Solution

The fourth proportional to 138,872.79, 191,643.98 and 75,210.57 is: 103,790.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872.79 : 191,643.98 = 75,210.57 : x
  2. Step 2: Convert to fraction form
    138,872.79/191,643.98 = 75,210.57/x
  3. Step 3: Cross multiply
    138,872.79x = 191,643.98 × 75,210.57
  4. Step 4: Simplify right side
    138,872.79x = 14,413,652,596.82
  5. Step 5: Solve for x
    x = 14,413,652,596.82/138,872.79
  6. Step 6: Final answer
    x = 103,790.33

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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.