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Finding the Fourth Proportional to 375,783.73, 563,749.30 and 139,128.46

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Solution

The fourth proportional to 375,783.73, 563,749.30 and 139,128.46 is: 208,719.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,783.73 : 563,749.30 = 139,128.46 : x
  2. Step 2: Convert to fraction form
    375,783.73/563,749.30 = 139,128.46/x
  3. Step 3: Cross multiply
    375,783.73x = 563,749.30 × 139,128.46
  4. Step 4: Simplify right side
    375,783.73x = 78,433,570,873.53
  5. Step 5: Solve for x
    x = 78,433,570,873.53/375,783.73
  6. Step 6: Final answer
    x = 208,719.98

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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.