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Finding the Fourth Proportional to 78,886.08, 108,860.80 and 43,077.12

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Solution

The fourth proportional to 78,886.08, 108,860.80 and 43,077.12 is: 59,445.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,886.08 : 108,860.80 = 43,077.12 : x
  2. Step 2: Convert to fraction form
    78,886.08/108,860.80 = 43,077.12/x
  3. Step 3: Cross multiply
    78,886.08x = 108,860.80 × 43,077.12
  4. Step 4: Simplify right side
    78,886.08x = 4,689,409,744.90
  5. Step 5: Solve for x
    x = 4,689,409,744.90/78,886.08
  6. Step 6: Final answer
    x = 59,445.34

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1.5x scale

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.