Home / 89,148.22-133,888.93-78,478.39

Finding the Fourth Proportional to 89,148.22, 133,888.93 and 78,478.39

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Solution

The fourth proportional to 89,148.22, 133,888.93 and 78,478.39 is: 117,864.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,148.22 : 133,888.93 = 78,478.39 : x
  2. Step 2: Convert to fraction form
    89,148.22/133,888.93 = 78,478.39/x
  3. Step 3: Cross multiply
    89,148.22x = 133,888.93 × 78,478.39
  4. Step 4: Simplify right side
    89,148.22x = 10,507,387,665.22
  5. Step 5: Solve for x
    x = 10,507,387,665.22/89,148.22
  6. Step 6: Final answer
    x = 117,864.25

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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.