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Finding the Fourth Proportional to 92,928.96, 128,281.20 and 62,755.20

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Solution

The fourth proportional to 92,928.96, 128,281.20 and 62,755.20 is: 86,628.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,928.96 : 128,281.20 = 62,755.20 : x
  2. Step 2: Convert to fraction form
    92,928.96/128,281.20 = 62,755.20/x
  3. Step 3: Cross multiply
    92,928.96x = 128,281.20 × 62,755.20
  4. Step 4: Simplify right side
    92,928.96x = 8,050,312,362.24
  5. Step 5: Solve for x
    x = 8,050,312,362.24/92,928.96
  6. Step 6: Final answer
    x = 86,628.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.