Home / 156,384.70-215,808.54-88,399.28

Finding the Fourth Proportional to 156,384.70, 215,808.54 and 88,399.28

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Solution

The fourth proportional to 156,384.70, 215,808.54 and 88,399.28 is: 121,989.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,384.70 : 215,808.54 = 88,399.28 : x
  2. Step 2: Convert to fraction form
    156,384.70/215,808.54 = 88,399.28/x
  3. Step 3: Cross multiply
    156,384.70x = 215,808.54 × 88,399.28
  4. Step 4: Simplify right side
    156,384.70x = 19,077,319,111.85
  5. Step 5: Solve for x
    x = 19,077,319,111.85/156,384.70
  6. Step 6: Final answer
    x = 121,989.68

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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.