Home / 66,409.10-91,638.15-38,109.32

Finding the Fourth Proportional to 66,409.10, 91,638.15 and 38,109.32

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Solution

The fourth proportional to 66,409.10, 91,638.15 and 38,109.32 is: 52,587.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,409.10 : 91,638.15 = 38,109.32 : x
  2. Step 2: Convert to fraction form
    66,409.10/91,638.15 = 38,109.32/x
  3. Step 3: Cross multiply
    66,409.10x = 91,638.15 × 38,109.32
  4. Step 4: Simplify right side
    66,409.10x = 3,492,267,668.74
  5. Step 5: Solve for x
    x = 3,492,267,668.74/66,409.10
  6. Step 6: Final answer
    x = 52,587.18

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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.