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Finding the Fourth Proportional to 72,330.99, 99,828.59 and 43,257.45

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Solution

The fourth proportional to 72,330.99, 99,828.59 and 43,257.45 is: 59,702.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,330.99 : 99,828.59 = 43,257.45 : x
  2. Step 2: Convert to fraction form
    72,330.99/99,828.59 = 43,257.45/x
  3. Step 3: Cross multiply
    72,330.99x = 99,828.59 × 43,257.45
  4. Step 4: Simplify right side
    72,330.99x = 4,318,330,024.21
  5. Step 5: Solve for x
    x = 4,318,330,024.21/72,330.99
  6. Step 6: Final answer
    x = 59,702.35

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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.