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Finding the Fourth Proportional to 54,705.20, 82,057.80 and 31,312.40

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Solution

The fourth proportional to 54,705.20, 82,057.80 and 31,312.40 is: 46,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,705.20 : 82,057.80 = 31,312.40 : x
  2. Step 2: Convert to fraction form
    54,705.20/82,057.80 = 31,312.40/x
  3. Step 3: Cross multiply
    54,705.20x = 82,057.80 × 31,312.40
  4. Step 4: Simplify right side
    54,705.20x = 2,569,426,656.72
  5. Step 5: Solve for x
    x = 2,569,426,656.72/54,705.20
  6. Step 6: Final answer
    x = 46,968.60

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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.