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Finding the Fourth Proportional to 255,806.18, 383,709.02 and 87,312.53

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Solution

The fourth proportional to 255,806.18, 383,709.02 and 87,312.53 is: 130,968.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,806.18 : 383,709.02 = 87,312.53 : x
  2. Step 2: Convert to fraction form
    255,806.18/383,709.02 = 87,312.53/x
  3. Step 3: Cross multiply
    255,806.18x = 383,709.02 × 87,312.53
  4. Step 4: Simplify right side
    255,806.18x = 33,502,606,579.43
  5. Step 5: Solve for x
    x = 33,502,606,579.43/255,806.18
  6. Step 6: Final answer
    x = 130,968.72

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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.