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Finding the Fourth Proportional to 121,313.98, 181,987.98 and 42,410.26

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Solution

The fourth proportional to 121,313.98, 181,987.98 and 42,410.26 is: 63,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,313.98 : 181,987.98 = 42,410.26 : x
  2. Step 2: Convert to fraction form
    121,313.98/181,987.98 = 42,410.26/x
  3. Step 3: Cross multiply
    121,313.98x = 181,987.98 × 42,410.26
  4. Step 4: Simplify right side
    121,313.98x = 7,718,157,548.67
  5. Step 5: Solve for x
    x = 7,718,157,548.67/121,313.98
  6. Step 6: Final answer
    x = 63,621.34

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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.