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Finding the Fourth Proportional to 92,823.36, 139,212.71 and 42,855.45

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Solution

The fourth proportional to 92,823.36, 139,212.71 and 42,855.45 is: 64,272.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,823.36 : 139,212.71 = 42,855.45 : x
  2. Step 2: Convert to fraction form
    92,823.36/139,212.71 = 42,855.45/x
  3. Step 3: Cross multiply
    92,823.36x = 139,212.71 × 42,855.45
  4. Step 4: Simplify right side
    92,823.36x = 5,966,023,332.77
  5. Step 5: Solve for x
    x = 5,966,023,332.77/92,823.36
  6. Step 6: Final answer
    x = 64,272.87

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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.