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Finding the Fourth Proportional to 286,063.66, 429,098.56 and 86,385.76

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Solution

The fourth proportional to 286,063.66, 429,098.56 and 86,385.76 is: 129,579.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,063.66 : 429,098.56 = 86,385.76 : x
  2. Step 2: Convert to fraction form
    286,063.66/429,098.56 = 86,385.76/x
  3. Step 3: Cross multiply
    286,063.66x = 429,098.56 × 86,385.76
  4. Step 4: Simplify right side
    286,063.66x = 37,068,005,220.51
  5. Step 5: Solve for x
    x = 37,068,005,220.51/286,063.66
  6. Step 6: Final answer
    x = 129,579.57

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1.5x scale

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.