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Finding the Fourth Proportional to 72,038.69, 99,294.41 and 48,156.65

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Solution

The fourth proportional to 72,038.69, 99,294.41 and 48,156.65 is: 66,376.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,038.69 : 99,294.41 = 48,156.65 : x
  2. Step 2: Convert to fraction form
    72,038.69/99,294.41 = 48,156.65/x
  3. Step 3: Cross multiply
    72,038.69x = 99,294.41 × 48,156.65
  4. Step 4: Simplify right side
    72,038.69x = 4,781,685,412.07
  5. Step 5: Solve for x
    x = 4,781,685,412.07/72,038.69
  6. Step 6: Final answer
    x = 66,376.63

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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.