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Finding the Fourth Proportional to 70,813.35, 97,725.21 and 38,985.21

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Solution

The fourth proportional to 70,813.35, 97,725.21 and 38,985.21 is: 53,801.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,813.35 : 97,725.21 = 38,985.21 : x
  2. Step 2: Convert to fraction form
    70,813.35/97,725.21 = 38,985.21/x
  3. Step 3: Cross multiply
    70,813.35x = 97,725.21 × 38,985.21
  4. Step 4: Simplify right side
    70,813.35x = 3,809,837,834.14
  5. Step 5: Solve for x
    x = 3,809,837,834.14/70,813.35
  6. Step 6: Final answer
    x = 53,801.12

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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.