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Finding the Fourth Proportional to 78,690.50, 108,592.89 and 43,362.50

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Solution

The fourth proportional to 78,690.50, 108,592.89 and 43,362.50 is: 59,840.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.50 : 108,592.89 = 43,362.50 : x
  2. Step 2: Convert to fraction form
    78,690.50/108,592.89 = 43,362.50/x
  3. Step 3: Cross multiply
    78,690.50x = 108,592.89 × 43,362.50
  4. Step 4: Simplify right side
    78,690.50x = 4,708,859,192.63
  5. Step 5: Solve for x
    x = 4,708,859,192.63/78,690.50
  6. Step 6: Final answer
    x = 59,840.25

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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.