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Finding the Fourth Proportional to 317,712.94, 476,661.65 and 128,075.44

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Solution

The fourth proportional to 317,712.94, 476,661.65 and 128,075.44 is: 192,150.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,712.94 : 476,661.65 = 128,075.44 : x
  2. Step 2: Convert to fraction form
    317,712.94/476,661.65 = 128,075.44/x
  3. Step 3: Cross multiply
    317,712.94x = 476,661.65 × 128,075.44
  4. Step 4: Simplify right side
    317,712.94x = 61,048,650,554.88
  5. Step 5: Solve for x
    x = 61,048,650,554.88/317,712.94
  6. Step 6: Final answer
    x = 192,150.34

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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.