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Finding the Fourth Proportional to 93,107.31, 128,478.32 and 52,808.19

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Solution

The fourth proportional to 93,107.31, 128,478.32 and 52,808.19 is: 72,869.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,107.31 : 128,478.32 = 52,808.19 : x
  2. Step 2: Convert to fraction form
    93,107.31/128,478.32 = 52,808.19/x
  3. Step 3: Cross multiply
    93,107.31x = 128,478.32 × 52,808.19
  4. Step 4: Simplify right side
    93,107.31x = 6,784,707,269.40
  5. Step 5: Solve for x
    x = 6,784,707,269.40/93,107.31
  6. Step 6: Final answer
    x = 72,869.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.