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Finding the Fourth Proportional to 55,386, 76,433 and 30,235.76

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Solution

The fourth proportional to 55,386, 76,433 and 30,235.76 is: 41,725.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,386 : 76,433 = 30,235.76 : x
  2. Step 2: Convert to fraction form
    55,386/76,433 = 30,235.76/x
  3. Step 3: Cross multiply
    55,386x = 76,433 × 30,235.76
  4. Step 4: Simplify right side
    55,386x = 2,311,009,844.08
  5. Step 5: Solve for x
    x = 2,311,009,844.08/55,386
  6. Step 6: Final answer
    x = 41,725.52

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Double scale
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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.