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Finding the Fourth Proportional to 112,587, 168,838.16 and 45,991.55

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Solution

The fourth proportional to 112,587, 168,838.16 and 45,991.55 is: 68,970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,587 : 168,838.16 = 45,991.55 : x
  2. Step 2: Convert to fraction form
    112,587/168,838.16 = 45,991.55/x
  3. Step 3: Cross multiply
    112,587x = 168,838.16 × 45,991.55
  4. Step 4: Simplify right side
    112,587x = 7,765,127,603.40
  5. Step 5: Solve for x
    x = 7,765,127,603.40/112,587
  6. Step 6: Final answer
    x = 68,970.02

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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.