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Finding the Fourth Proportional to 79,189.51, 118,657.90 and 58,031.50

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Solution

The fourth proportional to 79,189.51, 118,657.90 and 58,031.50 is: 86,954.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,189.51 : 118,657.90 = 58,031.50 : x
  2. Step 2: Convert to fraction form
    79,189.51/118,657.90 = 58,031.50/x
  3. Step 3: Cross multiply
    79,189.51x = 118,657.90 × 58,031.50
  4. Step 4: Simplify right side
    79,189.51x = 6,885,895,185.48
  5. Step 5: Solve for x
    x = 6,885,895,185.48/79,189.51
  6. Step 6: Final answer
    x = 86,954.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.