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Finding the Fourth Proportional to 112,118.40, 154,396.80 and 90,734.40

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Solution

The fourth proportional to 112,118.40, 154,396.80 and 90,734.40 is: 124,949.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,118.40 : 154,396.80 = 90,734.40 : x
  2. Step 2: Convert to fraction form
    112,118.40/154,396.80 = 90,734.40/x
  3. Step 3: Cross multiply
    112,118.40x = 154,396.80 × 90,734.40
  4. Step 4: Simplify right side
    112,118.40x = 14,009,101,009.92
  5. Step 5: Solve for x
    x = 14,009,101,009.92/112,118.40
  6. Step 6: Final answer
    x = 124,949.17

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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.