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Finding the Fourth Proportional to 128,484.82, 192,755.94 and 61,980.76

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Solution

The fourth proportional to 128,484.82, 192,755.94 and 61,980.76 is: 92,984.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,484.82 : 192,755.94 = 61,980.76 : x
  2. Step 2: Convert to fraction form
    128,484.82/192,755.94 = 61,980.76/x
  3. Step 3: Cross multiply
    128,484.82x = 192,755.94 × 61,980.76
  4. Step 4: Simplify right side
    128,484.82x = 11,947,159,655.71
  5. Step 5: Solve for x
    x = 11,947,159,655.71/128,484.82
  6. Step 6: Final answer
    x = 92,984.99

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1.5x scale

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.