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Finding the Fourth Proportional to 156,338.84, 215,746.69 and 84,718.86

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Solution

The fourth proportional to 156,338.84, 215,746.69 and 84,718.86 is: 116,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,338.84 : 215,746.69 = 84,718.86 : x
  2. Step 2: Convert to fraction form
    156,338.84/215,746.69 = 84,718.86/x
  3. Step 3: Cross multiply
    156,338.84x = 215,746.69 × 84,718.86
  4. Step 4: Simplify right side
    156,338.84x = 18,277,813,625.57
  5. Step 5: Solve for x
    x = 18,277,813,625.57/156,338.84
  6. Step 6: Final answer
    x = 116,911.53

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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.