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Finding the Fourth Proportional to 61,985.80, 92,978.70 and 59,361.40

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Solution

The fourth proportional to 61,985.80, 92,978.70 and 59,361.40 is: 89,042.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,985.80 : 92,978.70 = 59,361.40 : x
  2. Step 2: Convert to fraction form
    61,985.80/92,978.70 = 59,361.40/x
  3. Step 3: Cross multiply
    61,985.80x = 92,978.70 × 59,361.40
  4. Step 4: Simplify right side
    61,985.80x = 5,519,345,802.18
  5. Step 5: Solve for x
    x = 5,519,345,802.18/61,985.80
  6. Step 6: Final answer
    x = 89,042.10

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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.