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Finding the Fourth Proportional to 102,900.78, 142,031.07 and 60,472.98

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Solution

The fourth proportional to 102,900.78, 142,031.07 and 60,472.98 is: 83,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,900.78 : 142,031.07 = 60,472.98 : x
  2. Step 2: Convert to fraction form
    102,900.78/142,031.07 = 60,472.98/x
  3. Step 3: Cross multiply
    102,900.78x = 142,031.07 × 60,472.98
  4. Step 4: Simplify right side
    102,900.78x = 8,589,042,055.49
  5. Step 5: Solve for x
    x = 8,589,042,055.49/102,900.78
  6. Step 6: Final answer
    x = 83,469.16

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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.