Home / 89,721.53-134,360.70-66,870.59

Finding the Fourth Proportional to 89,721.53, 134,360.70 and 66,870.59

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Solution

The fourth proportional to 89,721.53, 134,360.70 and 66,870.59 is: 100,140.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,721.53 : 134,360.70 = 66,870.59 : x
  2. Step 2: Convert to fraction form
    89,721.53/134,360.70 = 66,870.59/x
  3. Step 3: Cross multiply
    89,721.53x = 134,360.70 × 66,870.59
  4. Step 4: Simplify right side
    89,721.53x = 8,984,779,281.81
  5. Step 5: Solve for x
    x = 8,984,779,281.81/89,721.53
  6. Step 6: Final answer
    x = 100,140.73

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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.