Home / 71,328.12-98,424.80-39,489.02

Finding the Fourth Proportional to 71,328.12, 98,424.80 and 39,489.02

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Solution

The fourth proportional to 71,328.12, 98,424.80 and 39,489.02 is: 54,490.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,328.12 : 98,424.80 = 39,489.02 : x
  2. Step 2: Convert to fraction form
    71,328.12/98,424.80 = 39,489.02/x
  3. Step 3: Cross multiply
    71,328.12x = 98,424.80 × 39,489.02
  4. Step 4: Simplify right side
    71,328.12x = 3,886,698,895.70
  5. Step 5: Solve for x
    x = 3,886,698,895.70/71,328.12
  6. Step 6: Final answer
    x = 54,490.42

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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.