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Finding the Fourth Proportional to 112,006.40, 167,815.20 and 72,543.20

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Solution

The fourth proportional to 112,006.40, 167,815.20 and 72,543.20 is: 108,688.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,006.40 : 167,815.20 = 72,543.20 : x
  2. Step 2: Convert to fraction form
    112,006.40/167,815.20 = 72,543.20/x
  3. Step 3: Cross multiply
    112,006.40x = 167,815.20 × 72,543.20
  4. Step 4: Simplify right side
    112,006.40x = 12,173,851,616.64
  5. Step 5: Solve for x
    x = 12,173,851,616.64/112,006.40
  6. Step 6: Final answer
    x = 108,688.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.