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Finding the Fourth Proportional to 61,602.12, 91,919.34 and 57,840.48

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Solution

The fourth proportional to 61,602.12, 91,919.34 and 57,840.48 is: 86,306.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,602.12 : 91,919.34 = 57,840.48 : x
  2. Step 2: Convert to fraction form
    61,602.12/91,919.34 = 57,840.48/x
  3. Step 3: Cross multiply
    61,602.12x = 91,919.34 × 57,840.48
  4. Step 4: Simplify right side
    61,602.12x = 5,316,658,746.88
  5. Step 5: Solve for x
    x = 5,316,658,746.88/61,602.12
  6. Step 6: Final answer
    x = 86,306.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.