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Finding the Fourth Proportional to 387,980.48, 581,995.31 and 121,751.50

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Solution

The fourth proportional to 387,980.48, 581,995.31 and 121,751.50 is: 182,634.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,980.48 : 581,995.31 = 121,751.50 : x
  2. Step 2: Convert to fraction form
    387,980.48/581,995.31 = 121,751.50/x
  3. Step 3: Cross multiply
    387,980.48x = 581,995.31 × 121,751.50
  4. Step 4: Simplify right side
    387,980.48x = 70,858,799,075.49
  5. Step 5: Solve for x
    x = 70,858,799,075.49/387,980.48
  6. Step 6: Final answer
    x = 182,634.96

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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.