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Finding the Fourth Proportional to 100,364.61, 138,463.65 and 57,914.94

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Solution

The fourth proportional to 100,364.61, 138,463.65 and 57,914.94 is: 79,899.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,364.61 : 138,463.65 = 57,914.94 : x
  2. Step 2: Convert to fraction form
    100,364.61/138,463.65 = 57,914.94/x
  3. Step 3: Cross multiply
    100,364.61x = 138,463.65 × 57,914.94
  4. Step 4: Simplify right side
    100,364.61x = 8,019,113,981.93
  5. Step 5: Solve for x
    x = 8,019,113,981.93/100,364.61
  6. Step 6: Final answer
    x = 79,899.82

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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.