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Finding the Fourth Proportional to 243,718.80, 336,329.64 and 136,287.60

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Solution

The fourth proportional to 243,718.80, 336,329.64 and 136,287.60 is: 188,075.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,718.80 : 336,329.64 = 136,287.60 : x
  2. Step 2: Convert to fraction form
    243,718.80/336,329.64 = 136,287.60/x
  3. Step 3: Cross multiply
    243,718.80x = 336,329.64 × 136,287.60
  4. Step 4: Simplify right side
    243,718.80x = 45,837,559,444.46
  5. Step 5: Solve for x
    x = 45,837,559,444.46/243,718.80
  6. Step 6: Final answer
    x = 188,075.60

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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.