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Finding the Fourth Proportional to 100,530.45, 138,796.98 and 62,330.58

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Solution

The fourth proportional to 100,530.45, 138,796.98 and 62,330.58 is: 86,056.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,530.45 : 138,796.98 = 62,330.58 : x
  2. Step 2: Convert to fraction form
    100,530.45/138,796.98 = 62,330.58/x
  3. Step 3: Cross multiply
    100,530.45x = 138,796.98 × 62,330.58
  4. Step 4: Simplify right side
    100,530.45x = 8,651,296,031.91
  5. Step 5: Solve for x
    x = 8,651,296,031.91/100,530.45
  6. Step 6: Final answer
    x = 86,056.47

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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.