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Finding the Fourth Proportional to 115,786.40, 173,679.60 and 56,737.40

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Solution

The fourth proportional to 115,786.40, 173,679.60 and 56,737.40 is: 85,106.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,786.40 : 173,679.60 = 56,737.40 : x
  2. Step 2: Convert to fraction form
    115,786.40/173,679.60 = 56,737.40/x
  3. Step 3: Cross multiply
    115,786.40x = 173,679.60 × 56,737.40
  4. Step 4: Simplify right side
    115,786.40x = 9,854,128,937.04
  5. Step 5: Solve for x
    x = 9,854,128,937.04/115,786.40
  6. Step 6: Final answer
    x = 85,106.10

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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.