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Finding the Fourth Proportional to 42,758.73, 64,136.07 and 28,724.67

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Solution

The fourth proportional to 42,758.73, 64,136.07 and 28,724.67 is: 43,085.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,758.73 : 64,136.07 = 28,724.67 : x
  2. Step 2: Convert to fraction form
    42,758.73/64,136.07 = 28,724.67/x
  3. Step 3: Cross multiply
    42,758.73x = 64,136.07 × 28,724.67
  4. Step 4: Simplify right side
    42,758.73x = 1,842,287,445.85
  5. Step 5: Solve for x
    x = 1,842,287,445.85/42,758.73
  6. Step 6: Final answer
    x = 43,085.64

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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.