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Finding the Fourth Proportional to 78,859.98, 108,810.48 and 45,319.50

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Solution

The fourth proportional to 78,859.98, 108,810.48 and 45,319.50 is: 62,531.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.98 : 108,810.48 = 45,319.50 : x
  2. Step 2: Convert to fraction form
    78,859.98/108,810.48 = 45,319.50/x
  3. Step 3: Cross multiply
    78,859.98x = 108,810.48 × 45,319.50
  4. Step 4: Simplify right side
    78,859.98x = 4,931,236,548.36
  5. Step 5: Solve for x
    x = 4,931,236,548.36/78,859.98
  6. Step 6: Final answer
    x = 62,531.55

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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.