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Finding the Fourth Proportional to 65,483.85, 90,379.53 and 38,624.76

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Solution

The fourth proportional to 65,483.85, 90,379.53 and 38,624.76 is: 53,309.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,483.85 : 90,379.53 = 38,624.76 : x
  2. Step 2: Convert to fraction form
    65,483.85/90,379.53 = 38,624.76/x
  3. Step 3: Cross multiply
    65,483.85x = 90,379.53 × 38,624.76
  4. Step 4: Simplify right side
    65,483.85x = 3,490,887,655.16
  5. Step 5: Solve for x
    x = 3,490,887,655.16/65,483.85
  6. Step 6: Final answer
    x = 53,309.14

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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.