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Finding the Fourth Proportional to 230,947.40, 346,334.70 and 81,129.80

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Solution

The fourth proportional to 230,947.40, 346,334.70 and 81,129.80 is: 121,664.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,947.40 : 346,334.70 = 81,129.80 : x
  2. Step 2: Convert to fraction form
    230,947.40/346,334.70 = 81,129.80/x
  3. Step 3: Cross multiply
    230,947.40x = 346,334.70 × 81,129.80
  4. Step 4: Simplify right side
    230,947.40x = 28,098,064,944.06
  5. Step 5: Solve for x
    x = 28,098,064,944.06/230,947.40
  6. Step 6: Final answer
    x = 121,664.35

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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.