Home / 100,329.52-138,457.37-56,718.60

Finding the Fourth Proportional to 100,329.52, 138,457.37 and 56,718.60

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Solution

The fourth proportional to 100,329.52, 138,457.37 and 56,718.60 is: 78,273.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,329.52 : 138,457.37 = 56,718.60 : x
  2. Step 2: Convert to fraction form
    100,329.52/138,457.37 = 56,718.60/x
  3. Step 3: Cross multiply
    100,329.52x = 138,457.37 × 56,718.60
  4. Step 4: Simplify right side
    100,329.52x = 7,853,108,186.08
  5. Step 5: Solve for x
    x = 7,853,108,186.08/100,329.52
  6. Step 6: Final answer
    x = 78,273.16

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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.