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Finding the Fourth Proportional to 58,842.70, 81,203.41 and 31,985.20

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Solution

The fourth proportional to 58,842.70, 81,203.41 and 31,985.20 is: 44,139.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,842.70 : 81,203.41 = 31,985.20 : x
  2. Step 2: Convert to fraction form
    58,842.70/81,203.41 = 31,985.20/x
  3. Step 3: Cross multiply
    58,842.70x = 81,203.41 × 31,985.20
  4. Step 4: Simplify right side
    58,842.70x = 2,597,307,309.53
  5. Step 5: Solve for x
    x = 2,597,307,309.53/58,842.70
  6. Step 6: Final answer
    x = 44,139.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.