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Finding the Fourth Proportional to 99,118.32, 136,749.78 and 56,646.60

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Solution

The fourth proportional to 99,118.32, 136,749.78 and 56,646.60 is: 78,153.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,118.32 : 136,749.78 = 56,646.60 : x
  2. Step 2: Convert to fraction form
    99,118.32/136,749.78 = 56,646.60/x
  3. Step 3: Cross multiply
    99,118.32x = 136,749.78 × 56,646.60
  4. Step 4: Simplify right side
    99,118.32x = 7,746,410,087.75
  5. Step 5: Solve for x
    x = 7,746,410,087.75/99,118.32
  6. Step 6: Final answer
    x = 78,153.16

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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.