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Finding the Fourth Proportional to 112,539.80, 168,809.70 and 73,141.40

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Solution

The fourth proportional to 112,539.80, 168,809.70 and 73,141.40 is: 109,712.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,539.80 : 168,809.70 = 73,141.40 : x
  2. Step 2: Convert to fraction form
    112,539.80/168,809.70 = 73,141.40/x
  3. Step 3: Cross multiply
    112,539.80x = 168,809.70 × 73,141.40
  4. Step 4: Simplify right side
    112,539.80x = 12,346,977,791.58
  5. Step 5: Solve for x
    x = 12,346,977,791.58/112,539.80
  6. Step 6: Final answer
    x = 109,712.10

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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.