Home / 105,420.15-145,480.86-57,675.51

Finding the Fourth Proportional to 105,420.15, 145,480.86 and 57,675.51

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Solution

The fourth proportional to 105,420.15, 145,480.86 and 57,675.51 is: 79,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,420.15 : 145,480.86 = 57,675.51 : x
  2. Step 2: Convert to fraction form
    105,420.15/145,480.86 = 57,675.51/x
  3. Step 3: Cross multiply
    105,420.15x = 145,480.86 × 57,675.51
  4. Step 4: Simplify right side
    105,420.15x = 8,390,682,795.74
  5. Step 5: Solve for x
    x = 8,390,682,795.74/105,420.15
  6. Step 6: Final answer
    x = 79,592.78

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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.