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Finding the Fourth Proportional to 93,133.60, 139,700.40 and 72,138.40

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Solution

The fourth proportional to 93,133.60, 139,700.40 and 72,138.40 is: 108,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,133.60 : 139,700.40 = 72,138.40 : x
  2. Step 2: Convert to fraction form
    93,133.60/139,700.40 = 72,138.40/x
  3. Step 3: Cross multiply
    93,133.60x = 139,700.40 × 72,138.40
  4. Step 4: Simplify right side
    93,133.60x = 10,077,763,335.36
  5. Step 5: Solve for x
    x = 10,077,763,335.36/93,133.60
  6. Step 6: Final answer
    x = 108,207.60

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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.