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Finding the Fourth Proportional to 93,438, 128,944.52 and 55,734.16

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Solution

The fourth proportional to 93,438, 128,944.52 and 55,734.16 is: 76,913.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,438 : 128,944.52 = 55,734.16 : x
  2. Step 2: Convert to fraction form
    93,438/128,944.52 = 55,734.16/x
  3. Step 3: Cross multiply
    93,438x = 128,944.52 × 55,734.16
  4. Step 4: Simplify right side
    93,438x = 7,186,614,508.80
  5. Step 5: Solve for x
    x = 7,186,614,508.80/93,438
  6. Step 6: Final answer
    x = 76,913.19

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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.