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Finding the Fourth Proportional to 58,431.76, 80,645.96 and 56,487.76

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Solution

The fourth proportional to 58,431.76, 80,645.96 and 56,487.76 is: 77,962.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,431.76 : 80,645.96 = 56,487.76 : x
  2. Step 2: Convert to fraction form
    58,431.76/80,645.96 = 56,487.76/x
  3. Step 3: Cross multiply
    58,431.76x = 80,645.96 × 56,487.76
  4. Step 4: Simplify right side
    58,431.76x = 4,555,509,633.45
  5. Step 5: Solve for x
    x = 4,555,509,633.45/58,431.76
  6. Step 6: Final answer
    x = 77,962.90

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1.5x scale

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.