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Finding the Fourth Proportional to 92,830.65, 139,142.29 and 85,357.59

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Solution

The fourth proportional to 92,830.65, 139,142.29 and 85,357.59 is: 127,941.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,830.65 : 139,142.29 = 85,357.59 : x
  2. Step 2: Convert to fraction form
    92,830.65/139,142.29 = 85,357.59/x
  3. Step 3: Cross multiply
    92,830.65x = 139,142.29 × 85,357.59
  4. Step 4: Simplify right side
    92,830.65x = 11,876,850,541.48
  5. Step 5: Solve for x
    x = 11,876,850,541.48/92,830.65
  6. Step 6: Final answer
    x = 127,941.05

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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.