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Finding the Fourth Proportional to 90,896.84, 125,402.78 and 56,425.40

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Solution

The fourth proportional to 90,896.84, 125,402.78 and 56,425.40 is: 77,845.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,896.84 : 125,402.78 = 56,425.40 : x
  2. Step 2: Convert to fraction form
    90,896.84/125,402.78 = 56,425.40/x
  3. Step 3: Cross multiply
    90,896.84x = 125,402.78 × 56,425.40
  4. Step 4: Simplify right side
    90,896.84x = 7,075,902,022.61
  5. Step 5: Solve for x
    x = 7,075,902,022.61/90,896.84
  6. Step 6: Final answer
    x = 77,845.41

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