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Finding the Fourth Proportional to 65,432.45, 98,148.71 and 21,059.20

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Solution

The fourth proportional to 65,432.45, 98,148.71 and 21,059.20 is: 31,588.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,432.45 : 98,148.71 = 21,059.20 : x
  2. Step 2: Convert to fraction form
    65,432.45/98,148.71 = 21,059.20/x
  3. Step 3: Cross multiply
    65,432.45x = 98,148.71 × 21,059.20
  4. Step 4: Simplify right side
    65,432.45x = 2,066,933,313.63
  5. Step 5: Solve for x
    x = 2,066,933,313.63/65,432.45
  6. Step 6: Final answer
    x = 31,588.81

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1.5x scale

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.