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Finding the Fourth Proportional to 65,455.70, 90,307.31 and 38,225.52

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Solution

The fourth proportional to 65,455.70, 90,307.31 and 38,225.52 is: 52,738.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,455.70 : 90,307.31 = 38,225.52 : x
  2. Step 2: Convert to fraction form
    65,455.70/90,307.31 = 38,225.52/x
  3. Step 3: Cross multiply
    65,455.70x = 90,307.31 × 38,225.52
  4. Step 4: Simplify right side
    65,455.70x = 3,452,043,693.42
  5. Step 5: Solve for x
    x = 3,452,043,693.42/65,455.70
  6. Step 6: Final answer
    x = 52,738.63

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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.