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Finding the Fourth Proportional to 72,178.98, 99,506.93 and 62,213.55

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Solution

The fourth proportional to 72,178.98, 99,506.93 and 62,213.55 is: 85,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,178.98 : 99,506.93 = 62,213.55 : x
  2. Step 2: Convert to fraction form
    72,178.98/99,506.93 = 62,213.55/x
  3. Step 3: Cross multiply
    72,178.98x = 99,506.93 × 62,213.55
  4. Step 4: Simplify right side
    72,178.98x = 6,190,679,053.83
  5. Step 5: Solve for x
    x = 6,190,679,053.83/72,178.98
  6. Step 6: Final answer
    x = 85,768.45

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1.5x scale

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.