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Finding the Fourth Proportional to 145,838.25, 201,256.92 and 78,770.25

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Solution

The fourth proportional to 145,838.25, 201,256.92 and 78,770.25 is: 108,703.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,838.25 : 201,256.92 = 78,770.25 : x
  2. Step 2: Convert to fraction form
    145,838.25/201,256.92 = 78,770.25/x
  3. Step 3: Cross multiply
    145,838.25x = 201,256.92 × 78,770.25
  4. Step 4: Simplify right side
    145,838.25x = 15,853,057,902.63
  5. Step 5: Solve for x
    x = 15,853,057,902.63/145,838.25
  6. Step 6: Final answer
    x = 108,703.02

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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.