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Finding the Fourth Proportional to 145,820.85, 201,232.79 and 78,752.85

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Solution

The fourth proportional to 145,820.85, 201,232.79 and 78,752.85 is: 108,678.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,820.85 : 201,232.79 = 78,752.85 : x
  2. Step 2: Convert to fraction form
    145,820.85/201,232.79 = 78,752.85/x
  3. Step 3: Cross multiply
    145,820.85x = 201,232.79 × 78,752.85
  4. Step 4: Simplify right side
    145,820.85x = 15,847,655,725.95
  5. Step 5: Solve for x
    x = 15,847,655,725.95/145,820.85
  6. Step 6: Final answer
    x = 108,678.94

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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.