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Finding the Fourth Proportional to 70,939.77, 97,897.54 and 39,109.81

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Solution

The fourth proportional to 70,939.77, 97,897.54 and 39,109.81 is: 53,971.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,939.77 : 97,897.54 = 39,109.81 : x
  2. Step 2: Convert to fraction form
    70,939.77/97,897.54 = 39,109.81/x
  3. Step 3: Cross multiply
    70,939.77x = 97,897.54 × 39,109.81
  4. Step 4: Simplify right side
    70,939.77x = 3,828,754,188.87
  5. Step 5: Solve for x
    x = 3,828,754,188.87/70,939.77
  6. Step 6: Final answer
    x = 53,971.90

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1.5x scale

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.