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Finding the Fourth Proportional to 65,411.60, 98,124.60 and 21,030.80

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Solution

The fourth proportional to 65,411.60, 98,124.60 and 21,030.80 is: 31,548.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,411.60 : 98,124.60 = 21,030.80 : x
  2. Step 2: Convert to fraction form
    65,411.60/98,124.60 = 21,030.80/x
  3. Step 3: Cross multiply
    65,411.60x = 98,124.60 × 21,030.80
  4. Step 4: Simplify right side
    65,411.60x = 2,063,638,837.68
  5. Step 5: Solve for x
    x = 2,063,638,837.68/65,411.60
  6. Step 6: Final answer
    x = 31,548.51

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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.