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Finding the Fourth Proportional to 65,764.20, 98,646.30 and 21,392.40

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Solution

The fourth proportional to 65,764.20, 98,646.30 and 21,392.40 is: 32,088.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,764.20 : 98,646.30 = 21,392.40 : x
  2. Step 2: Convert to fraction form
    65,764.20/98,646.30 = 21,392.40/x
  3. Step 3: Cross multiply
    65,764.20x = 98,646.30 × 21,392.40
  4. Step 4: Simplify right side
    65,764.20x = 2,110,281,108.12
  5. Step 5: Solve for x
    x = 2,110,281,108.12/65,764.20
  6. Step 6: Final answer
    x = 32,088.60

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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.