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Finding the Fourth Proportional to 69,089.61, 103,095.60 and 61,642.89

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Solution

The fourth proportional to 69,089.61, 103,095.60 and 61,642.89 is: 91,983.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,089.61 : 103,095.60 = 61,642.89 : x
  2. Step 2: Convert to fraction form
    69,089.61/103,095.60 = 61,642.89/x
  3. Step 3: Cross multiply
    69,089.61x = 103,095.60 × 61,642.89
  4. Step 4: Simplify right side
    69,089.61x = 6,355,110,730.28
  5. Step 5: Solve for x
    x = 6,355,110,730.28/69,089.61
  6. Step 6: Final answer
    x = 91,983.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.