Home / 100,329.02-138,456.68-56,718.10

Finding the Fourth Proportional to 100,329.02, 138,456.68 and 56,718.10

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Solution

The fourth proportional to 100,329.02, 138,456.68 and 56,718.10 is: 78,272.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,329.02 : 138,456.68 = 56,718.10 : x
  2. Step 2: Convert to fraction form
    100,329.02/138,456.68 = 56,718.10/x
  3. Step 3: Cross multiply
    100,329.02x = 138,456.68 × 56,718.10
  4. Step 4: Simplify right side
    100,329.02x = 7,852,999,821.91
  5. Step 5: Solve for x
    x = 7,852,999,821.91/100,329.02
  6. Step 6: Final answer
    x = 78,272.47

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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.