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Finding the Fourth Proportional to 77,611.40, 116,468.30 and 28,363.40

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Solution

The fourth proportional to 77,611.40, 116,468.30 and 28,363.40 is: 42,563.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,611.40 : 116,468.30 = 28,363.40 : x
  2. Step 2: Convert to fraction form
    77,611.40/116,468.30 = 28,363.40/x
  3. Step 3: Cross multiply
    77,611.40x = 116,468.30 × 28,363.40
  4. Step 4: Simplify right side
    77,611.40x = 3,303,436,980.22
  5. Step 5: Solve for x
    x = 3,303,436,980.22/77,611.40
  6. Step 6: Final answer
    x = 42,563.81

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1.5x scale

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.