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Finding the Fourth Proportional to 92,700.13, 139,014.16 and 31,898.80

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Solution

The fourth proportional to 92,700.13, 139,014.16 and 31,898.80 is: 47,835.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,700.13 : 139,014.16 = 31,898.80 : x
  2. Step 2: Convert to fraction form
    92,700.13/139,014.16 = 31,898.80/x
  3. Step 3: Cross multiply
    92,700.13x = 139,014.16 × 31,898.80
  4. Step 4: Simplify right side
    92,700.13x = 4,434,384,887.01
  5. Step 5: Solve for x
    x = 4,434,384,887.01/92,700.13
  6. Step 6: Final answer
    x = 47,835.80

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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.