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Finding the Fourth Proportional to 61,870.91, 85,377.15 and 36,378.32

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Solution

The fourth proportional to 61,870.91, 85,377.15 and 36,378.32 is: 50,199.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,870.91 : 85,377.15 = 36,378.32 : x
  2. Step 2: Convert to fraction form
    61,870.91/85,377.15 = 36,378.32/x
  3. Step 3: Cross multiply
    61,870.91x = 85,377.15 × 36,378.32
  4. Step 4: Simplify right side
    61,870.91x = 3,105,877,283.39
  5. Step 5: Solve for x
    x = 3,105,877,283.39/61,870.91
  6. Step 6: Final answer
    x = 50,199.31

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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.