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Finding the Fourth Proportional to 71,994, 99,509.04 and 63,430.68

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Solution

The fourth proportional to 71,994, 99,509.04 and 63,430.68 is: 87,672.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994 : 99,509.04 = 63,430.68 : x
  2. Step 2: Convert to fraction form
    71,994/99,509.04 = 63,430.68/x
  3. Step 3: Cross multiply
    71,994x = 99,509.04 × 63,430.68
  4. Step 4: Simplify right side
    71,994x = 6,311,926,073.35
  5. Step 5: Solve for x
    x = 6,311,926,073.35/71,994
  6. Step 6: Final answer
    x = 87,672.95

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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.