Home / 105,543.90-145,649.54-57,145.59

Finding the Fourth Proportional to 105,543.90, 145,649.54 and 57,145.59

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Solution

The fourth proportional to 105,543.90, 145,649.54 and 57,145.59 is: 78,860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,543.90 : 145,649.54 = 57,145.59 : x
  2. Step 2: Convert to fraction form
    105,543.90/145,649.54 = 57,145.59/x
  3. Step 3: Cross multiply
    105,543.90x = 145,649.54 × 57,145.59
  4. Step 4: Simplify right side
    105,543.90x = 8,323,229,039.39
  5. Step 5: Solve for x
    x = 8,323,229,039.39/105,543.90
  6. Step 6: Final answer
    x = 78,860.35

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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.