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Finding the Fourth Proportional to 112,013.40, 168,020.10 and 72,355.80

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Solution

The fourth proportional to 112,013.40, 168,020.10 and 72,355.80 is: 108,533.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,013.40 : 168,020.10 = 72,355.80 : x
  2. Step 2: Convert to fraction form
    112,013.40/168,020.10 = 72,355.80/x
  3. Step 3: Cross multiply
    112,013.40x = 168,020.10 × 72,355.80
  4. Step 4: Simplify right side
    112,013.40x = 12,157,228,751.58
  5. Step 5: Solve for x
    x = 12,157,228,751.58/112,013.40
  6. Step 6: Final answer
    x = 108,533.70

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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.