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Finding the Fourth Proportional to 56,389.80, 77,812.50 and 33,724.20

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Solution

The fourth proportional to 56,389.80, 77,812.50 and 33,724.20 is: 46,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,389.80 : 77,812.50 = 33,724.20 : x
  2. Step 2: Convert to fraction form
    56,389.80/77,812.50 = 33,724.20/x
  3. Step 3: Cross multiply
    56,389.80x = 77,812.50 × 33,724.20
  4. Step 4: Simplify right side
    56,389.80x = 2,624,164,312.50
  5. Step 5: Solve for x
    x = 2,624,164,312.50/56,389.80
  6. Step 6: Final answer
    x = 46,536.15

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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.