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Finding the Fourth Proportional to 139,397.32, 209,071.30 and 63,478.46

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Solution

The fourth proportional to 139,397.32, 209,071.30 and 63,478.46 is: 95,206.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,397.32 : 209,071.30 = 63,478.46 : x
  2. Step 2: Convert to fraction form
    139,397.32/209,071.30 = 63,478.46/x
  3. Step 3: Cross multiply
    139,397.32x = 209,071.30 × 63,478.46
  4. Step 4: Simplify right side
    139,397.32x = 13,271,524,154.20
  5. Step 5: Solve for x
    x = 13,271,524,154.20/139,397.32
  6. Step 6: Final answer
    x = 95,206.45

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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.