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Finding the Fourth Proportional to 276,870.90, 415,402.71 and 87,360.51

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Solution

The fourth proportional to 276,870.90, 415,402.71 and 87,360.51 is: 131,071.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,870.90 : 415,402.71 = 87,360.51 : x
  2. Step 2: Convert to fraction form
    276,870.90/415,402.71 = 87,360.51/x
  3. Step 3: Cross multiply
    276,870.90x = 415,402.71 × 87,360.51
  4. Step 4: Simplify right side
    276,870.90x = 36,289,792,600.98
  5. Step 5: Solve for x
    x = 36,289,792,600.98/276,870.90
  6. Step 6: Final answer
    x = 131,071.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.