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Finding the Fourth Proportional to 247,978.15, 342,216.91 and 151,187.60

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Solution

The fourth proportional to 247,978.15, 342,216.91 and 151,187.60 is: 208,643.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,978.15 : 342,216.91 = 151,187.60 : x
  2. Step 2: Convert to fraction form
    247,978.15/342,216.91 = 151,187.60/x
  3. Step 3: Cross multiply
    247,978.15x = 342,216.91 × 151,187.60
  4. Step 4: Simplify right side
    247,978.15x = 51,738,953,302.32
  5. Step 5: Solve for x
    x = 51,738,953,302.32/247,978.15
  6. Step 6: Final answer
    x = 208,643.19

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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.