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Finding the Fourth Proportional to 60,643.60, 90,965.40 and 54,228.40

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Solution

The fourth proportional to 60,643.60, 90,965.40 and 54,228.40 is: 81,342.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,643.60 : 90,965.40 = 54,228.40 : x
  2. Step 2: Convert to fraction form
    60,643.60/90,965.40 = 54,228.40/x
  3. Step 3: Cross multiply
    60,643.60x = 90,965.40 × 54,228.40
  4. Step 4: Simplify right side
    60,643.60x = 4,932,908,097.36
  5. Step 5: Solve for x
    x = 4,932,908,097.36/60,643.60
  6. Step 6: Final answer
    x = 81,342.60

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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.