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Finding the Fourth Proportional to 68,117.32, 93,987.80 and 39,817.52

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Solution

The fourth proportional to 68,117.32, 93,987.80 and 39,817.52 is: 54,939.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,117.32 : 93,987.80 = 39,817.52 : x
  2. Step 2: Convert to fraction form
    68,117.32/93,987.80 = 39,817.52/x
  3. Step 3: Cross multiply
    68,117.32x = 93,987.80 × 39,817.52
  4. Step 4: Simplify right side
    68,117.32x = 3,742,361,106.26
  5. Step 5: Solve for x
    x = 3,742,361,106.26/68,117.32
  6. Step 6: Final answer
    x = 54,939.93

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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.