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Finding the Fourth Proportional to 92,920.20, 139,322.70 and 53,457.80

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Solution

The fourth proportional to 92,920.20, 139,322.70 and 53,457.80 is: 80,153.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,920.20 : 139,322.70 = 53,457.80 : x
  2. Step 2: Convert to fraction form
    92,920.20/139,322.70 = 53,457.80/x
  3. Step 3: Cross multiply
    92,920.20x = 139,322.70 × 53,457.80
  4. Step 4: Simplify right side
    92,920.20x = 7,447,885,032.06
  5. Step 5: Solve for x
    x = 7,447,885,032.06/92,920.20
  6. Step 6: Final answer
    x = 80,153.56

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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.