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Finding the Fourth Proportional to 77,157.68, 106,487.40 and 43,168.05

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Solution

The fourth proportional to 77,157.68, 106,487.40 and 43,168.05 is: 59,577.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,157.68 : 106,487.40 = 43,168.05 : x
  2. Step 2: Convert to fraction form
    77,157.68/106,487.40 = 43,168.05/x
  3. Step 3: Cross multiply
    77,157.68x = 106,487.40 × 43,168.05
  4. Step 4: Simplify right side
    77,157.68x = 4,596,853,407.57
  5. Step 5: Solve for x
    x = 4,596,853,407.57/77,157.68
  6. Step 6: Final answer
    x = 59,577.40

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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.