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Finding the Fourth Proportional to 70,779.97, 97,680.39 and 40,570.32

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Solution

The fourth proportional to 70,779.97, 97,680.39 and 40,570.32 is: 55,989.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,779.97 : 97,680.39 = 40,570.32 : x
  2. Step 2: Convert to fraction form
    70,779.97/97,680.39 = 40,570.32/x
  3. Step 3: Cross multiply
    70,779.97x = 97,680.39 × 40,570.32
  4. Step 4: Simplify right side
    70,779.97x = 3,962,924,191.62
  5. Step 5: Solve for x
    x = 3,962,924,191.62/70,779.97
  6. Step 6: Final answer
    x = 55,989.35

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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.