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Finding the Fourth Proportional to 93,212.70, 139,720.59 and 66,903.18

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Solution

The fourth proportional to 93,212.70, 139,720.59 and 66,903.18 is: 100,284.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,212.70 : 139,720.59 = 66,903.18 : x
  2. Step 2: Convert to fraction form
    93,212.70/139,720.59 = 66,903.18/x
  3. Step 3: Cross multiply
    93,212.70x = 139,720.59 × 66,903.18
  4. Step 4: Simplify right side
    93,212.70x = 9,347,751,782.48
  5. Step 5: Solve for x
    x = 9,347,751,782.48/93,212.70
  6. Step 6: Final answer
    x = 100,284.10

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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.