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Finding the Fourth Proportional to 58,142.40, 87,213.60 and 21,201.60

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Solution

The fourth proportional to 58,142.40, 87,213.60 and 21,201.60 is: 31,802.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,142.40 : 87,213.60 = 21,201.60 : x
  2. Step 2: Convert to fraction form
    58,142.40/87,213.60 = 21,201.60/x
  3. Step 3: Cross multiply
    58,142.40x = 87,213.60 × 21,201.60
  4. Step 4: Simplify right side
    58,142.40x = 1,849,067,861.76
  5. Step 5: Solve for x
    x = 1,849,067,861.76/58,142.40
  6. Step 6: Final answer
    x = 31,802.40

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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.