Home / 55,637.28-76,779.50-30,486.78

Finding the Fourth Proportional to 55,637.28, 76,779.50 and 30,486.78

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Solution

The fourth proportional to 55,637.28, 76,779.50 and 30,486.78 is: 42,071.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,637.28 : 76,779.50 = 30,486.78 : x
  2. Step 2: Convert to fraction form
    55,637.28/76,779.50 = 30,486.78/x
  3. Step 3: Cross multiply
    55,637.28x = 76,779.50 × 30,486.78
  4. Step 4: Simplify right side
    55,637.28x = 2,340,759,572.58
  5. Step 5: Solve for x
    x = 2,340,759,572.58/55,637.28
  6. Step 6: Final answer
    x = 42,071.78

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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.