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Finding the Fourth Proportional to 93,103.40, 139,655.10 and 72,341.80

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Solution

The fourth proportional to 93,103.40, 139,655.10 and 72,341.80 is: 108,512.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,103.40 : 139,655.10 = 72,341.80 : x
  2. Step 2: Convert to fraction form
    93,103.40/139,655.10 = 72,341.80/x
  3. Step 3: Cross multiply
    93,103.40x = 139,655.10 × 72,341.80
  4. Step 4: Simplify right side
    93,103.40x = 10,102,901,313.18
  5. Step 5: Solve for x
    x = 10,102,901,313.18/93,103.40
  6. Step 6: Final answer
    x = 108,512.70

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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.