Home / 76,779.28-105,954.33-42,789.16

Finding the Fourth Proportional to 76,779.28, 105,954.33 and 42,789.16

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Solution

The fourth proportional to 76,779.28, 105,954.33 and 42,789.16 is: 59,048.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,779.28 : 105,954.33 = 42,789.16 : x
  2. Step 2: Convert to fraction form
    76,779.28/105,954.33 = 42,789.16/x
  3. Step 3: Cross multiply
    76,779.28x = 105,954.33 × 42,789.16
  4. Step 4: Simplify right side
    76,779.28x = 4,533,696,779.06
  5. Step 5: Solve for x
    x = 4,533,696,779.06/76,779.28
  6. Step 6: Final answer
    x = 59,048.44

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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.