Home / 77,281.64-106,543.94-66,071.55

Finding the Fourth Proportional to 77,281.64, 106,543.94 and 66,071.55

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Solution

The fourth proportional to 77,281.64, 106,543.94 and 66,071.55 is: 91,089.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,281.64 : 106,543.94 = 66,071.55 : x
  2. Step 2: Convert to fraction form
    77,281.64/106,543.94 = 66,071.55/x
  3. Step 3: Cross multiply
    77,281.64x = 106,543.94 × 66,071.55
  4. Step 4: Simplify right side
    77,281.64x = 7,039,522,928.55
  5. Step 5: Solve for x
    x = 7,039,522,928.55/77,281.64
  6. Step 6: Final answer
    x = 91,089.21

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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.