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Finding the Fourth Proportional to 61,858.69, 85,365.19 and 37,985.15

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Solution

The fourth proportional to 61,858.69, 85,365.19 and 37,985.15 is: 52,419.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,858.69 : 85,365.19 = 37,985.15 : x
  2. Step 2: Convert to fraction form
    61,858.69/85,365.19 = 37,985.15/x
  3. Step 3: Cross multiply
    61,858.69x = 85,365.19 × 37,985.15
  4. Step 4: Simplify right side
    61,858.69x = 3,242,609,807.82
  5. Step 5: Solve for x
    x = 3,242,609,807.82/61,858.69
  6. Step 6: Final answer
    x = 52,419.63

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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.