Home / 55,779.28-76,975.36-30,628.78

Finding the Fourth Proportional to 55,779.28, 76,975.36 and 30,628.78

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Solution

The fourth proportional to 55,779.28, 76,975.36 and 30,628.78 is: 42,267.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,779.28 : 76,975.36 = 30,628.78 : x
  2. Step 2: Convert to fraction form
    55,779.28/76,975.36 = 30,628.78/x
  3. Step 3: Cross multiply
    55,779.28x = 76,975.36 × 30,628.78
  4. Step 4: Simplify right side
    55,779.28x = 2,357,661,703.12
  5. Step 5: Solve for x
    x = 2,357,661,703.12/55,779.28
  6. Step 6: Final answer
    x = 42,267.69

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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.