Home / 65,669.36-90,623.63-38,821.55

Finding the Fourth Proportional to 65,669.36, 90,623.63 and 38,821.55

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Solution

The fourth proportional to 65,669.36, 90,623.63 and 38,821.55 is: 53,573.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,669.36 : 90,623.63 = 38,821.55 : x
  2. Step 2: Convert to fraction form
    65,669.36/90,623.63 = 38,821.55/x
  3. Step 3: Cross multiply
    65,669.36x = 90,623.63 × 38,821.55
  4. Step 4: Simplify right side
    65,669.36x = 3,518,149,427.16
  5. Step 5: Solve for x
    x = 3,518,149,427.16/65,669.36
  6. Step 6: Final answer
    x = 53,573.69

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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.