Home / 429,054.66-643,686.04-129,517.35

Finding the Fourth Proportional to 429,054.66, 643,686.04 and 129,517.35

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Solution

The fourth proportional to 429,054.66, 643,686.04 and 129,517.35 is: 194,307.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,054.66 : 643,686.04 = 129,517.35 : x
  2. Step 2: Convert to fraction form
    429,054.66/643,686.04 = 129,517.35/x
  3. Step 3: Cross multiply
    429,054.66x = 643,686.04 × 129,517.35
  4. Step 4: Simplify right side
    429,054.66x = 83,368,507,880.87
  5. Step 5: Solve for x
    x = 83,368,507,880.87/429,054.66
  6. Step 6: Final answer
    x = 194,307.43

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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.