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Finding the Fourth Proportional to 61,870.74, 85,380.78 and 35,018.56

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Solution

The fourth proportional to 61,870.74, 85,380.78 and 35,018.56 is: 48,325.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,870.74 : 85,380.78 = 35,018.56 : x
  2. Step 2: Convert to fraction form
    61,870.74/85,380.78 = 35,018.56/x
  3. Step 3: Cross multiply
    61,870.74x = 85,380.78 × 35,018.56
  4. Step 4: Simplify right side
    61,870.74x = 2,989,911,967.28
  5. Step 5: Solve for x
    x = 2,989,911,967.28/61,870.74
  6. Step 6: Final answer
    x = 48,325.14

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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.