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Finding the Fourth Proportional to 56,710.40, 85,073.70 and 19,272.20

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Solution

The fourth proportional to 56,710.40, 85,073.70 and 19,272.20 is: 28,911.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,710.40 : 85,073.70 = 19,272.20 : x
  2. Step 2: Convert to fraction form
    56,710.40/85,073.70 = 19,272.20/x
  3. Step 3: Cross multiply
    56,710.40x = 85,073.70 × 19,272.20
  4. Step 4: Simplify right side
    56,710.40x = 1,639,557,361.14
  5. Step 5: Solve for x
    x = 1,639,557,361.14/56,710.40
  6. Step 6: Final answer
    x = 28,911.05

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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.