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Finding the Fourth Proportional to 65,316.90, 90,140.89 and 36,645.65

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Solution

The fourth proportional to 65,316.90, 90,140.89 and 36,645.65 is: 50,572.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,316.90 : 90,140.89 = 36,645.65 : x
  2. Step 2: Convert to fraction form
    65,316.90/90,140.89 = 36,645.65/x
  3. Step 3: Cross multiply
    65,316.90x = 90,140.89 × 36,645.65
  4. Step 4: Simplify right side
    65,316.90x = 3,303,270,963.31
  5. Step 5: Solve for x
    x = 3,303,270,963.31/65,316.90
  6. Step 6: Final answer
    x = 50,572.99

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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.