Home / 156,356.16-215,794.66-99,000.81

Finding the Fourth Proportional to 156,356.16, 215,794.66 and 99,000.81

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Solution

The fourth proportional to 156,356.16, 215,794.66 and 99,000.81 is: 136,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,356.16 : 215,794.66 = 99,000.81 : x
  2. Step 2: Convert to fraction form
    156,356.16/215,794.66 = 99,000.81/x
  3. Step 3: Cross multiply
    156,356.16x = 215,794.66 × 99,000.81
  4. Step 4: Simplify right side
    156,356.16x = 21,363,845,886.17
  5. Step 5: Solve for x
    x = 21,363,845,886.17/156,356.16
  6. Step 6: Final answer
    x = 136,635.78

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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.