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Finding the Fourth Proportional to 53,211.60, 79,676.60 and 42,632.40

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Solution

The fourth proportional to 53,211.60, 79,676.60 and 42,632.40 is: 63,835.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,211.60 : 79,676.60 = 42,632.40 : x
  2. Step 2: Convert to fraction form
    53,211.60/79,676.60 = 42,632.40/x
  3. Step 3: Cross multiply
    53,211.60x = 79,676.60 × 42,632.40
  4. Step 4: Simplify right side
    53,211.60x = 3,396,804,681.84
  5. Step 5: Solve for x
    x = 3,396,804,681.84/53,211.60
  6. Step 6: Final answer
    x = 63,835.79

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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.