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Finding the Fourth Proportional to 70,907.71, 97,853.31 and 39,077.77

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Solution

The fourth proportional to 70,907.71, 97,853.31 and 39,077.77 is: 53,927.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,907.71 : 97,853.31 = 39,077.77 : x
  2. Step 2: Convert to fraction form
    70,907.71/97,853.31 = 39,077.77/x
  3. Step 3: Cross multiply
    70,907.71x = 97,853.31 × 39,077.77
  4. Step 4: Simplify right side
    70,907.71x = 3,823,889,141.92
  5. Step 5: Solve for x
    x = 3,823,889,141.92/70,907.71
  6. Step 6: Final answer
    x = 53,927.69

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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.