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Finding the Fourth Proportional to 61,870.37, 85,419.79 and 42,522.59

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Solution

The fourth proportional to 61,870.37, 85,419.79 and 42,522.59 is: 58,707.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,870.37 : 85,419.79 = 42,522.59 : x
  2. Step 2: Convert to fraction form
    61,870.37/85,419.79 = 42,522.59/x
  3. Step 3: Cross multiply
    61,870.37x = 85,419.79 × 42,522.59
  4. Step 4: Simplify right side
    61,870.37x = 3,632,270,815.30
  5. Step 5: Solve for x
    x = 3,632,270,815.30/61,870.37
  6. Step 6: Final answer
    x = 58,707.76

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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.