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Finding the Fourth Proportional to 72,548.88, 100,152.90 and 56,378.04

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Solution

The fourth proportional to 72,548.88, 100,152.90 and 56,378.04 is: 77,829.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,548.88 : 100,152.90 = 56,378.04 : x
  2. Step 2: Convert to fraction form
    72,548.88/100,152.90 = 56,378.04/x
  3. Step 3: Cross multiply
    72,548.88x = 100,152.90 × 56,378.04
  4. Step 4: Simplify right side
    72,548.88x = 5,646,424,202.32
  5. Step 5: Solve for x
    x = 5,646,424,202.32/72,548.88
  6. Step 6: Final answer
    x = 77,829.24

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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.