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Finding the Fourth Proportional to 100,364.59, 138,493.15 and 57,936.79

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Solution

The fourth proportional to 100,364.59, 138,493.15 and 57,936.79 is: 79,947.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,364.59 : 138,493.15 = 57,936.79 : x
  2. Step 2: Convert to fraction form
    100,364.59/138,493.15 = 57,936.79/x
  3. Step 3: Cross multiply
    100,364.59x = 138,493.15 × 57,936.79
  4. Step 4: Simplify right side
    100,364.59x = 8,023,848,547.99
  5. Step 5: Solve for x
    x = 8,023,848,547.99/100,364.59
  6. Step 6: Final answer
    x = 79,947.01

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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.