Home / 105,420.51-145,480.23-57,673.89

Finding the Fourth Proportional to 105,420.51, 145,480.23 and 57,673.89

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Solution

The fourth proportional to 105,420.51, 145,480.23 and 57,673.89 is: 79,589.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,420.51 : 145,480.23 = 57,673.89 : x
  2. Step 2: Convert to fraction form
    105,420.51/145,480.23 = 57,673.89/x
  3. Step 3: Cross multiply
    105,420.51x = 145,480.23 × 57,673.89
  4. Step 4: Simplify right side
    105,420.51x = 8,390,410,782.19
  5. Step 5: Solve for x
    x = 8,390,410,782.19/105,420.51
  6. Step 6: Final answer
    x = 79,589.93

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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.