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Finding the Fourth Proportional to 70,980.69, 97,951.64 and 39,148.91

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Solution

The fourth proportional to 70,980.69, 97,951.64 and 39,148.91 is: 54,024.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,980.69 : 97,951.64 = 39,148.91 : x
  2. Step 2: Convert to fraction form
    70,980.69/97,951.64 = 39,148.91/x
  3. Step 3: Cross multiply
    70,980.69x = 97,951.64 × 39,148.91
  4. Step 4: Simplify right side
    70,980.69x = 3,834,699,938.71
  5. Step 5: Solve for x
    x = 3,834,699,938.71/70,980.69
  6. Step 6: Final answer
    x = 54,024.55

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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.