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Finding the Fourth Proportional to 138,421, 207,646.08 and 63,528.40

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Solution

The fourth proportional to 138,421, 207,646.08 and 63,528.40 is: 95,299.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,421 : 207,646.08 = 63,528.40 : x
  2. Step 2: Convert to fraction form
    138,421/207,646.08 = 63,528.40/x
  3. Step 3: Cross multiply
    138,421x = 207,646.08 × 63,528.40
  4. Step 4: Simplify right side
    138,421x = 13,191,423,228.67
  5. Step 5: Solve for x
    x = 13,191,423,228.67/138,421
  6. Step 6: Final answer
    x = 95,299.29

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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.