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Finding the Fourth Proportional to 58,435.91, 80,641.58 and 31,578.40

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Solution

The fourth proportional to 58,435.91, 80,641.58 and 31,578.40 is: 43,578.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,435.91 : 80,641.58 = 31,578.40 : x
  2. Step 2: Convert to fraction form
    58,435.91/80,641.58 = 31,578.40/x
  3. Step 3: Cross multiply
    58,435.91x = 80,641.58 × 31,578.40
  4. Step 4: Simplify right side
    58,435.91x = 2,546,532,012.78
  5. Step 5: Solve for x
    x = 2,546,532,012.78/58,435.91
  6. Step 6: Final answer
    x = 43,578.21

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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.