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Finding the Fourth Proportional to 105,310.80, 145,308.75 and 59,987.79

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Solution

The fourth proportional to 105,310.80, 145,308.75 and 59,987.79 is: 82,771.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,310.80 : 145,308.75 = 59,987.79 : x
  2. Step 2: Convert to fraction form
    105,310.80/145,308.75 = 59,987.79/x
  3. Step 3: Cross multiply
    105,310.80x = 145,308.75 × 59,987.79
  4. Step 4: Simplify right side
    105,310.80x = 8,716,750,780.16
  5. Step 5: Solve for x
    x = 8,716,750,780.16/105,310.80
  6. Step 6: Final answer
    x = 82,771.67

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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.