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Finding the Fourth Proportional to 157,700.40, 236,477.70 and 68,908.20

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Solution

The fourth proportional to 157,700.40, 236,477.70 and 68,908.20 is: 103,330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,700.40 : 236,477.70 = 68,908.20 : x
  2. Step 2: Convert to fraction form
    157,700.40/236,477.70 = 68,908.20/x
  3. Step 3: Cross multiply
    157,700.40x = 236,477.70 × 68,908.20
  4. Step 4: Simplify right side
    157,700.40x = 16,295,252,647.14
  5. Step 5: Solve for x
    x = 16,295,252,647.14/157,700.40
  6. Step 6: Final answer
    x = 103,330.45

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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.