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Finding the Fourth Proportional to 61,985.70, 92,978.55 and 43,323.30

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Solution

The fourth proportional to 61,985.70, 92,978.55 and 43,323.30 is: 64,984.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,985.70 : 92,978.55 = 43,323.30 : x
  2. Step 2: Convert to fraction form
    61,985.70/92,978.55 = 43,323.30/x
  3. Step 3: Cross multiply
    61,985.70x = 92,978.55 × 43,323.30
  4. Step 4: Simplify right side
    61,985.70x = 4,028,137,615.22
  5. Step 5: Solve for x
    x = 4,028,137,615.22/61,985.70
  6. Step 6: Final answer
    x = 64,984.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.