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Finding the Fourth Proportional to 61,124.40, 91,268.41 and 54,758.20

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Solution

The fourth proportional to 61,124.40, 91,268.41 and 54,758.20 is: 81,762.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,124.40 : 91,268.41 = 54,758.20 : x
  2. Step 2: Convert to fraction form
    61,124.40/91,268.41 = 54,758.20/x
  3. Step 3: Cross multiply
    61,124.40x = 91,268.41 × 54,758.20
  4. Step 4: Simplify right side
    61,124.40x = 4,997,693,848.46
  5. Step 5: Solve for x
    x = 4,997,693,848.46/61,124.40
  6. Step 6: Final answer
    x = 81,762.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.