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Finding the Fourth Proportional to 93,449.70, 128,903.13 and 66,600.90

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Solution

The fourth proportional to 93,449.70, 128,903.13 and 66,600.90 is: 91,868.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,449.70 : 128,903.13 = 66,600.90 : x
  2. Step 2: Convert to fraction form
    93,449.70/128,903.13 = 66,600.90/x
  3. Step 3: Cross multiply
    93,449.70x = 128,903.13 × 66,600.90
  4. Step 4: Simplify right side
    93,449.70x = 8,585,064,470.82
  5. Step 5: Solve for x
    x = 8,585,064,470.82/93,449.70
  6. Step 6: Final answer
    x = 91,868.29

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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.