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Finding the Fourth Proportional to 100,970.13, 139,339.74 and 55,649.77

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Solution

The fourth proportional to 100,970.13, 139,339.74 and 55,649.77 is: 76,797.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,970.13 : 139,339.74 = 55,649.77 : x
  2. Step 2: Convert to fraction form
    100,970.13/139,339.74 = 55,649.77/x
  3. Step 3: Cross multiply
    100,970.13x = 139,339.74 × 55,649.77
  4. Step 4: Simplify right side
    100,970.13x = 7,754,224,482.86
  5. Step 5: Solve for x
    x = 7,754,224,482.86/100,970.13
  6. Step 6: Final answer
    x = 76,797.21

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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.