Home / 92,421.20-138,631.80-45,664.40

Finding the Fourth Proportional to 92,421.20, 138,631.80 and 45,664.40

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Solution

The fourth proportional to 92,421.20, 138,631.80 and 45,664.40 is: 68,496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,421.20 : 138,631.80 = 45,664.40 : x
  2. Step 2: Convert to fraction form
    92,421.20/138,631.80 = 45,664.40/x
  3. Step 3: Cross multiply
    92,421.20x = 138,631.80 × 45,664.40
  4. Step 4: Simplify right side
    92,421.20x = 6,330,537,967.92
  5. Step 5: Solve for x
    x = 6,330,537,967.92/92,421.20
  6. Step 6: Final answer
    x = 68,496.60

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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.