Home / 71,661.20-98,895.80-39,830.63

Finding the Fourth Proportional to 71,661.20, 98,895.80 and 39,830.63

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Solution

The fourth proportional to 71,661.20, 98,895.80 and 39,830.63 is: 54,968.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,661.20 : 98,895.80 = 39,830.63 : x
  2. Step 2: Convert to fraction form
    71,661.20/98,895.80 = 39,830.63/x
  3. Step 3: Cross multiply
    71,661.20x = 98,895.80 × 39,830.63
  4. Step 4: Simplify right side
    71,661.20x = 3,939,081,623.45
  5. Step 5: Solve for x
    x = 3,939,081,623.45/71,661.20
  6. Step 6: Final answer
    x = 54,968.13

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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.