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Finding the Fourth Proportional to 156,641.84, 216,159.94 and 85,020.32

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Solution

The fourth proportional to 156,641.84, 216,159.94 and 85,020.32 is: 117,324.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,641.84 : 216,159.94 = 85,020.32 : x
  2. Step 2: Convert to fraction form
    156,641.84/216,159.94 = 85,020.32/x
  3. Step 3: Cross multiply
    156,641.84x = 216,159.94 × 85,020.32
  4. Step 4: Simplify right side
    156,641.84x = 18,377,987,269.98
  5. Step 5: Solve for x
    x = 18,377,987,269.98/156,641.84
  6. Step 6: Final answer
    x = 117,324.89

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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.