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Finding the Fourth Proportional to 93,085.60, 139,628.40 and 72,090.40

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Solution

The fourth proportional to 93,085.60, 139,628.40 and 72,090.40 is: 108,135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,085.60 : 139,628.40 = 72,090.40 : x
  2. Step 2: Convert to fraction form
    93,085.60/139,628.40 = 72,090.40/x
  3. Step 3: Cross multiply
    93,085.60x = 139,628.40 × 72,090.40
  4. Step 4: Simplify right side
    93,085.60x = 10,065,867,207.36
  5. Step 5: Solve for x
    x = 10,065,867,207.36/93,085.60
  6. Step 6: Final answer
    x = 108,135.60

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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.