Home / 90,020.16-135,023.76-39,424.32

Finding the Fourth Proportional to 90,020.16, 135,023.76 and 39,424.32

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Solution

The fourth proportional to 90,020.16, 135,023.76 and 39,424.32 is: 59,133.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,020.16 : 135,023.76 = 39,424.32 : x
  2. Step 2: Convert to fraction form
    90,020.16/135,023.76 = 39,424.32/x
  3. Step 3: Cross multiply
    90,020.16x = 135,023.76 × 39,424.32
  4. Step 4: Simplify right side
    90,020.16x = 5,323,219,921.84
  5. Step 5: Solve for x
    x = 5,323,219,921.84/90,020.16
  6. Step 6: Final answer
    x = 59,133.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.