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Finding the Fourth Proportional to 318,075.19, 477,101.85 and 81,419.92

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Solution

The fourth proportional to 318,075.19, 477,101.85 and 81,419.92 is: 122,127.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,075.19 : 477,101.85 = 81,419.92 : x
  2. Step 2: Convert to fraction form
    318,075.19/477,101.85 = 81,419.92/x
  3. Step 3: Cross multiply
    318,075.19x = 477,101.85 × 81,419.92
  4. Step 4: Simplify right side
    318,075.19x = 38,845,594,458.85
  5. Step 5: Solve for x
    x = 38,845,594,458.85/318,075.19
  6. Step 6: Final answer
    x = 122,127.08

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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.