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Finding the Fourth Proportional to 61,220.79, 91,866.63 and 25,678.95

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Solution

The fourth proportional to 61,220.79, 91,866.63 and 25,678.95 is: 38,533.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,220.79 : 91,866.63 = 25,678.95 : x
  2. Step 2: Convert to fraction form
    61,220.79/91,866.63 = 25,678.95/x
  3. Step 3: Cross multiply
    61,220.79x = 91,866.63 × 25,678.95
  4. Step 4: Simplify right side
    61,220.79x = 2,359,038,598.44
  5. Step 5: Solve for x
    x = 2,359,038,598.44/61,220.79
  6. Step 6: Final answer
    x = 38,533.29

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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.