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Finding the Fourth Proportional to 60,865.80, 91,312.30 and 21,424.20

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Solution

The fourth proportional to 60,865.80, 91,312.30 and 21,424.20 is: 32,141.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,865.80 : 91,312.30 = 21,424.20 : x
  2. Step 2: Convert to fraction form
    60,865.80/91,312.30 = 21,424.20/x
  3. Step 3: Cross multiply
    60,865.80x = 91,312.30 × 21,424.20
  4. Step 4: Simplify right side
    60,865.80x = 1,956,292,977.66
  5. Step 5: Solve for x
    x = 1,956,292,977.66/60,865.80
  6. Step 6: Final answer
    x = 32,141.09

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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.