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Finding the Fourth Proportional to 255,935.80, 383,903.67 and 87,457.58

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Solution

The fourth proportional to 255,935.80, 383,903.67 and 87,457.58 is: 131,186.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,935.80 : 383,903.67 = 87,457.58 : x
  2. Step 2: Convert to fraction form
    255,935.80/383,903.67 = 87,457.58/x
  3. Step 3: Cross multiply
    255,935.80x = 383,903.67 × 87,457.58
  4. Step 4: Simplify right side
    255,935.80x = 33,575,285,931.32
  5. Step 5: Solve for x
    x = 33,575,285,931.32/255,935.80
  6. Step 6: Final answer
    x = 131,186.36

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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.