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Finding the Fourth Proportional to 92,710.80, 139,066.20 and 57,281.40

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Solution

The fourth proportional to 92,710.80, 139,066.20 and 57,281.40 is: 85,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,710.80 : 139,066.20 = 57,281.40 : x
  2. Step 2: Convert to fraction form
    92,710.80/139,066.20 = 57,281.40/x
  3. Step 3: Cross multiply
    92,710.80x = 139,066.20 × 57,281.40
  4. Step 4: Simplify right side
    92,710.80x = 7,965,906,628.68
  5. Step 5: Solve for x
    x = 7,965,906,628.68/92,710.80
  6. Step 6: Final answer
    x = 85,922.10

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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.