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Finding the Fourth Proportional to 92,705.70, 139,050.45 and 30,376.20

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Solution

The fourth proportional to 92,705.70, 139,050.45 and 30,376.20 is: 45,561.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,705.70 : 139,050.45 = 30,376.20 : x
  2. Step 2: Convert to fraction form
    92,705.70/139,050.45 = 30,376.20/x
  3. Step 3: Cross multiply
    92,705.70x = 139,050.45 × 30,376.20
  4. Step 4: Simplify right side
    92,705.70x = 4,223,824,279.29
  5. Step 5: Solve for x
    x = 4,223,824,279.29/92,705.70
  6. Step 6: Final answer
    x = 45,561.65

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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.