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Finding the Fourth Proportional to 113,616, 156,730.44 and 86,711.64

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Solution

The fourth proportional to 113,616, 156,730.44 and 86,711.64 is: 119,616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,616 : 156,730.44 = 86,711.64 : x
  2. Step 2: Convert to fraction form
    113,616/156,730.44 = 86,711.64/x
  3. Step 3: Cross multiply
    113,616x = 156,730.44 × 86,711.64
  4. Step 4: Simplify right side
    113,616x = 13,590,353,490.32
  5. Step 5: Solve for x
    x = 13,590,353,490.32/113,616
  6. Step 6: Final answer
    x = 119,616.55

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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.