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Finding the Fourth Proportional to 77,460.80, 115,903.20 and 56,724.80

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Solution

The fourth proportional to 77,460.80, 115,903.20 and 56,724.80 is: 84,876.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,460.80 : 115,903.20 = 56,724.80 : x
  2. Step 2: Convert to fraction form
    77,460.80/115,903.20 = 56,724.80/x
  3. Step 3: Cross multiply
    77,460.80x = 115,903.20 × 56,724.80
  4. Step 4: Simplify right side
    77,460.80x = 6,574,585,839.36
  5. Step 5: Solve for x
    x = 6,574,585,839.36/77,460.80
  6. Step 6: Final answer
    x = 84,876.30

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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.