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Finding the Fourth Proportional to 156,915.88, 216,548.12 and 85,300.72

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Solution

The fourth proportional to 156,915.88, 216,548.12 and 85,300.72 is: 117,717.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,915.88 : 216,548.12 = 85,300.72 : x
  2. Step 2: Convert to fraction form
    156,915.88/216,548.12 = 85,300.72/x
  3. Step 3: Cross multiply
    156,915.88x = 216,548.12 × 85,300.72
  4. Step 4: Simplify right side
    156,915.88x = 18,471,710,550.65
  5. Step 5: Solve for x
    x = 18,471,710,550.65/156,915.88
  6. Step 6: Final answer
    x = 117,717.28

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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.