Home / 87,890.47-121,255.38-64,975.31

Finding the Fourth Proportional to 87,890.47, 121,255.38 and 64,975.31

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Solution

The fourth proportional to 87,890.47, 121,255.38 and 64,975.31 is: 89,641.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,890.47 : 121,255.38 = 64,975.31 : x
  2. Step 2: Convert to fraction form
    87,890.47/121,255.38 = 64,975.31/x
  3. Step 3: Cross multiply
    87,890.47x = 121,255.38 × 64,975.31
  4. Step 4: Simplify right side
    87,890.47x = 7,878,606,435.16
  5. Step 5: Solve for x
    x = 7,878,606,435.16/87,890.47
  6. Step 6: Final answer
    x = 89,641.19

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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.