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Finding the Fourth Proportional to 65,697.40, 98,521.80 and 21,325.60

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Solution

The fourth proportional to 65,697.40, 98,521.80 and 21,325.60 is: 31,980.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,697.40 : 98,521.80 = 21,325.60 : x
  2. Step 2: Convert to fraction form
    65,697.40/98,521.80 = 21,325.60/x
  3. Step 3: Cross multiply
    65,697.40x = 98,521.80 × 21,325.60
  4. Step 4: Simplify right side
    65,697.40x = 2,101,036,498.08
  5. Step 5: Solve for x
    x = 2,101,036,498.08/65,697.40
  6. Step 6: Final answer
    x = 31,980.51

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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.