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Finding the Fourth Proportional to 65,848.03, 90,870.70 and 38,618.56

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Solution

The fourth proportional to 65,848.03, 90,870.70 and 38,618.56 is: 53,293.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,848.03 : 90,870.70 = 38,618.56 : x
  2. Step 2: Convert to fraction form
    65,848.03/90,870.70 = 38,618.56/x
  3. Step 3: Cross multiply
    65,848.03x = 90,870.70 × 38,618.56
  4. Step 4: Simplify right side
    65,848.03x = 3,509,295,256.47
  5. Step 5: Solve for x
    x = 3,509,295,256.47/65,848.03
  6. Step 6: Final answer
    x = 53,293.86

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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.