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Finding the Fourth Proportional to 276,646.60, 414,969.90 and 87,130.90

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Solution

The fourth proportional to 276,646.60, 414,969.90 and 87,130.90 is: 130,696.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,646.60 : 414,969.90 = 87,130.90 : x
  2. Step 2: Convert to fraction form
    276,646.60/414,969.90 = 87,130.90/x
  3. Step 3: Cross multiply
    276,646.60x = 414,969.90 × 87,130.90
  4. Step 4: Simplify right side
    276,646.60x = 36,156,700,859.91
  5. Step 5: Solve for x
    x = 36,156,700,859.91/276,646.60
  6. Step 6: Final answer
    x = 130,696.35

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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.