Home / 70,085.60-96,721-39,876.24

Finding the Fourth Proportional to 70,085.60, 96,721 and 39,876.24

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Solution

The fourth proportional to 70,085.60, 96,721 and 39,876.24 is: 55,030.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,085.60 : 96,721 = 39,876.24 : x
  2. Step 2: Convert to fraction form
    70,085.60/96,721 = 39,876.24/x
  3. Step 3: Cross multiply
    70,085.60x = 96,721 × 39,876.24
  4. Step 4: Simplify right side
    70,085.60x = 3,856,869,809.04
  5. Step 5: Solve for x
    x = 3,856,869,809.04/70,085.60
  6. Step 6: Final answer
    x = 55,030.85

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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.