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Finding the Fourth Proportional to 56,728.60, 85,101.90 and 19,292.20

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Solution

The fourth proportional to 56,728.60, 85,101.90 and 19,292.20 is: 28,941.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,728.60 : 85,101.90 = 19,292.20 : x
  2. Step 2: Convert to fraction form
    56,728.60/85,101.90 = 19,292.20/x
  3. Step 3: Cross multiply
    56,728.60x = 85,101.90 × 19,292.20
  4. Step 4: Simplify right side
    56,728.60x = 1,641,802,875.18
  5. Step 5: Solve for x
    x = 1,641,802,875.18/56,728.60
  6. Step 6: Final answer
    x = 28,941.36

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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.