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Finding the Fourth Proportional to 93,092.80, 139,639.20 and 90,905.80

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Solution

The fourth proportional to 93,092.80, 139,639.20 and 90,905.80 is: 136,358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,092.80 : 139,639.20 = 90,905.80 : x
  2. Step 2: Convert to fraction form
    93,092.80/139,639.20 = 90,905.80/x
  3. Step 3: Cross multiply
    93,092.80x = 139,639.20 × 90,905.80
  4. Step 4: Simplify right side
    93,092.80x = 12,694,013,187.36
  5. Step 5: Solve for x
    x = 12,694,013,187.36/93,092.80
  6. Step 6: Final answer
    x = 136,358.70

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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.