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Finding the Fourth Proportional to 99,293.72, 136,991.79 and 56,268.68

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Solution

The fourth proportional to 99,293.72, 136,991.79 and 56,268.68 is: 77,631.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,293.72 : 136,991.79 = 56,268.68 : x
  2. Step 2: Convert to fraction form
    99,293.72/136,991.79 = 56,268.68/x
  3. Step 3: Cross multiply
    99,293.72x = 136,991.79 × 56,268.68
  4. Step 4: Simplify right side
    99,293.72x = 7,708,346,509.18
  5. Step 5: Solve for x
    x = 7,708,346,509.18/99,293.72
  6. Step 6: Final answer
    x = 77,631.77

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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.