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Finding the Fourth Proportional to 291,492, 437,238 and 81,135.41

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Solution

The fourth proportional to 291,492, 437,238 and 81,135.41 is: 121,703.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,492 : 437,238 = 81,135.41 : x
  2. Step 2: Convert to fraction form
    291,492/437,238 = 81,135.41/x
  3. Step 3: Cross multiply
    291,492x = 437,238 × 81,135.41
  4. Step 4: Simplify right side
    291,492x = 35,475,482,211.39
  5. Step 5: Solve for x
    x = 35,475,482,211.39/291,492
  6. Step 6: Final answer
    x = 121,703.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.