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Finding the Fourth Proportional to 92,856.80, 139,285.20 and 64,863.20

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Solution

The fourth proportional to 92,856.80, 139,285.20 and 64,863.20 is: 97,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,856.80 : 139,285.20 = 64,863.20 : x
  2. Step 2: Convert to fraction form
    92,856.80/139,285.20 = 64,863.20/x
  3. Step 3: Cross multiply
    92,856.80x = 139,285.20 × 64,863.20
  4. Step 4: Simplify right side
    92,856.80x = 9,034,483,784.64
  5. Step 5: Solve for x
    x = 9,034,483,784.64/92,856.80
  6. Step 6: Final answer
    x = 97,294.80

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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.