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Finding the Fourth Proportional to 72,553.58, 100,128.43 and 48,312.98

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Solution

The fourth proportional to 72,553.58, 100,128.43 and 48,312.98 is: 66,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,553.58 : 100,128.43 = 48,312.98 : x
  2. Step 2: Convert to fraction form
    72,553.58/100,128.43 = 48,312.98/x
  3. Step 3: Cross multiply
    72,553.58x = 100,128.43 × 48,312.98
  4. Step 4: Simplify right side
    72,553.58x = 4,837,502,836.02
  5. Step 5: Solve for x
    x = 4,837,502,836.02/72,553.58
  6. Step 6: Final answer
    x = 66,674.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.