Home / 143,779.41-198,412.92-78,368.80

Finding the Fourth Proportional to 143,779.41, 198,412.92 and 78,368.80

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Solution

The fourth proportional to 143,779.41, 198,412.92 and 78,368.80 is: 108,147.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,779.41 : 198,412.92 = 78,368.80 : x
  2. Step 2: Convert to fraction form
    143,779.41/198,412.92 = 78,368.80/x
  3. Step 3: Cross multiply
    143,779.41x = 198,412.92 × 78,368.80
  4. Step 4: Simplify right side
    143,779.41x = 15,549,382,444.90
  5. Step 5: Solve for x
    x = 15,549,382,444.90/143,779.41
  6. Step 6: Final answer
    x = 108,147.49

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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.