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Finding the Fourth Proportional to 286,366.05, 429,554.53 and 86,685.66

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Solution

The fourth proportional to 286,366.05, 429,554.53 and 86,685.66 is: 130,030.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,366.05 : 429,554.53 = 86,685.66 : x
  2. Step 2: Convert to fraction form
    286,366.05/429,554.53 = 86,685.66/x
  3. Step 3: Cross multiply
    286,366.05x = 429,554.53 × 86,685.66
  4. Step 4: Simplify right side
    286,366.05x = 37,236,217,939.04
  5. Step 5: Solve for x
    x = 37,236,217,939.04/286,366.05
  6. Step 6: Final answer
    x = 130,030.14

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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.