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Finding the Fourth Proportional to 156,379.90, 215,801.90 and 88,394.48

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Solution

The fourth proportional to 156,379.90, 215,801.90 and 88,394.48 is: 121,983.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,379.90 : 215,801.90 = 88,394.48 : x
  2. Step 2: Convert to fraction form
    156,379.90/215,801.90 = 88,394.48/x
  3. Step 3: Cross multiply
    156,379.90x = 215,801.90 × 88,394.48
  4. Step 4: Simplify right side
    156,379.90x = 19,075,696,733.51
  5. Step 5: Solve for x
    x = 19,075,696,733.51/156,379.90
  6. Step 6: Final answer
    x = 121,983.05

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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.