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Finding the Fourth Proportional to 94,656.80, 141,812.40 and 77,031.20

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Solution

The fourth proportional to 94,656.80, 141,812.40 and 77,031.20 is: 115,406.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,656.80 : 141,812.40 = 77,031.20 : x
  2. Step 2: Convert to fraction form
    94,656.80/141,812.40 = 77,031.20/x
  3. Step 3: Cross multiply
    94,656.80x = 141,812.40 × 77,031.20
  4. Step 4: Simplify right side
    94,656.80x = 10,923,979,346.88
  5. Step 5: Solve for x
    x = 10,923,979,346.88/94,656.80
  6. Step 6: Final answer
    x = 115,406.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.