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Finding the Fourth Proportional to 156,386.64, 215,812.32 and 84,764.82

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Solution

The fourth proportional to 156,386.64, 215,812.32 and 84,764.82 is: 116,974.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,386.64 : 215,812.32 = 84,764.82 : x
  2. Step 2: Convert to fraction form
    156,386.64/215,812.32 = 84,764.82/x
  3. Step 3: Cross multiply
    156,386.64x = 215,812.32 × 84,764.82
  4. Step 4: Simplify right side
    156,386.64x = 18,293,292,458.58
  5. Step 5: Solve for x
    x = 18,293,292,458.58/156,386.64
  6. Step 6: Final answer
    x = 116,974.78

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1.5x scale

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.