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Finding the Fourth Proportional to 56,776.80, 85,165.20 and 55,610.40

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Solution

The fourth proportional to 56,776.80, 85,165.20 and 55,610.40 is: 83,415.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,776.80 : 85,165.20 = 55,610.40 : x
  2. Step 2: Convert to fraction form
    56,776.80/85,165.20 = 55,610.40/x
  3. Step 3: Cross multiply
    56,776.80x = 85,165.20 × 55,610.40
  4. Step 4: Simplify right side
    56,776.80x = 4,736,070,838.08
  5. Step 5: Solve for x
    x = 4,736,070,838.08/56,776.80
  6. Step 6: Final answer
    x = 83,415.60

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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.