Home / 105,543.65-145,649.20-57,145.34

Finding the Fourth Proportional to 105,543.65, 145,649.20 and 57,145.34

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Solution

The fourth proportional to 105,543.65, 145,649.20 and 57,145.34 is: 78,860.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,543.65 : 145,649.20 = 57,145.34 : x
  2. Step 2: Convert to fraction form
    105,543.65/145,649.20 = 57,145.34/x
  3. Step 3: Cross multiply
    105,543.65x = 145,649.20 × 57,145.34
  4. Step 4: Simplify right side
    105,543.65x = 8,323,172,769.00
  5. Step 5: Solve for x
    x = 8,323,172,769.00/105,543.65
  6. Step 6: Final answer
    x = 78,860.01

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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.