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Finding the Fourth Proportional to 65,271.60, 97,907.40 and 20,899.80

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Solution

The fourth proportional to 65,271.60, 97,907.40 and 20,899.80 is: 31,349.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,271.60 : 97,907.40 = 20,899.80 : x
  2. Step 2: Convert to fraction form
    65,271.60/97,907.40 = 20,899.80/x
  3. Step 3: Cross multiply
    65,271.60x = 97,907.40 × 20,899.80
  4. Step 4: Simplify right side
    65,271.60x = 2,046,245,078.52
  5. Step 5: Solve for x
    x = 2,046,245,078.52/65,271.60
  6. Step 6: Final answer
    x = 31,349.70

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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.