Home / 78,072.84-107,802.63-72,102.33

Finding the Fourth Proportional to 78,072.84, 107,802.63 and 72,102.33

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Solution

The fourth proportional to 78,072.84, 107,802.63 and 72,102.33 is: 99,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,072.84 : 107,802.63 = 72,102.33 : x
  2. Step 2: Convert to fraction form
    78,072.84/107,802.63 = 72,102.33/x
  3. Step 3: Cross multiply
    78,072.84x = 107,802.63 × 72,102.33
  4. Step 4: Simplify right side
    78,072.84x = 7,772,820,803.13
  5. Step 5: Solve for x
    x = 7,772,820,803.13/78,072.84
  6. Step 6: Final answer
    x = 99,558.58

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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.