Home / 89,430.81-123,415.95-51,190.20

Finding the Fourth Proportional to 89,430.81, 123,415.95 and 51,190.20

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Solution

The fourth proportional to 89,430.81, 123,415.95 and 51,190.20 is: 70,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,430.81 : 123,415.95 = 51,190.20 : x
  2. Step 2: Convert to fraction form
    89,430.81/123,415.95 = 51,190.20/x
  3. Step 3: Cross multiply
    89,430.81x = 123,415.95 × 51,190.20
  4. Step 4: Simplify right side
    89,430.81x = 6,317,687,163.69
  5. Step 5: Solve for x
    x = 6,317,687,163.69/89,430.81
  6. Step 6: Final answer
    x = 70,643.30

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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.