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Finding the Fourth Proportional to 56,612.70, 77,990.54 and 39,585.11

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Solution

The fourth proportional to 56,612.70, 77,990.54 and 39,585.11 is: 54,533.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,612.70 : 77,990.54 = 39,585.11 : x
  2. Step 2: Convert to fraction form
    56,612.70/77,990.54 = 39,585.11/x
  3. Step 3: Cross multiply
    56,612.70x = 77,990.54 × 39,585.11
  4. Step 4: Simplify right side
    56,612.70x = 3,087,263,516.98
  5. Step 5: Solve for x
    x = 3,087,263,516.98/56,612.70
  6. Step 6: Final answer
    x = 54,533.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.