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Finding the Fourth Proportional to 65,477.57, 90,179.73 and 56,521.80

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Solution

The fourth proportional to 65,477.57, 90,179.73 and 56,521.80 is: 77,845.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,477.57 : 90,179.73 = 56,521.80 : x
  2. Step 2: Convert to fraction form
    65,477.57/90,179.73 = 56,521.80/x
  3. Step 3: Cross multiply
    65,477.57x = 90,179.73 × 56,521.80
  4. Step 4: Simplify right side
    65,477.57x = 5,097,120,663.11
  5. Step 5: Solve for x
    x = 5,097,120,663.11/65,477.57
  6. Step 6: Final answer
    x = 77,845.30

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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.