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Finding the Fourth Proportional to 78,859.64, 108,810.04 and 45,319.16

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Solution

The fourth proportional to 78,859.64, 108,810.04 and 45,319.16 is: 62,531.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.64 : 108,810.04 = 45,319.16 : x
  2. Step 2: Convert to fraction form
    78,859.64/108,810.04 = 45,319.16/x
  3. Step 3: Cross multiply
    78,859.64x = 108,810.04 × 45,319.16
  4. Step 4: Simplify right side
    78,859.64x = 4,931,179,612.37
  5. Step 5: Solve for x
    x = 4,931,179,612.37/78,859.64
  6. Step 6: Final answer
    x = 62,531.09

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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.