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Finding the Fourth Proportional to 72,466.50, 99,953.18 and 70,028

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Solution

The fourth proportional to 72,466.50, 99,953.18 and 70,028 is: 96,589.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,466.50 : 99,953.18 = 70,028 : x
  2. Step 2: Convert to fraction form
    72,466.50/99,953.18 = 70,028/x
  3. Step 3: Cross multiply
    72,466.50x = 99,953.18 × 70,028
  4. Step 4: Simplify right side
    72,466.50x = 6,999,521,289.04
  5. Step 5: Solve for x
    x = 6,999,521,289.04/72,466.50
  6. Step 6: Final answer
    x = 96,589.75

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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.