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Finding the Fourth Proportional to 72,488.70, 108,603.45 and 61,343.10

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Solution

The fourth proportional to 72,488.70, 108,603.45 and 61,343.10 is: 91,904.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,488.70 : 108,603.45 = 61,343.10 : x
  2. Step 2: Convert to fraction form
    72,488.70/108,603.45 = 61,343.10/x
  3. Step 3: Cross multiply
    72,488.70x = 108,603.45 × 61,343.10
  4. Step 4: Simplify right side
    72,488.70x = 6,662,072,293.70
  5. Step 5: Solve for x
    x = 6,662,072,293.70/72,488.70
  6. Step 6: Final answer
    x = 91,904.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.