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Finding the Fourth Proportional to 129,859.90, 194,655.45 and 70,570.30

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Solution

The fourth proportional to 129,859.90, 194,655.45 and 70,570.30 is: 105,782.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,859.90 : 194,655.45 = 70,570.30 : x
  2. Step 2: Convert to fraction form
    129,859.90/194,655.45 = 70,570.30/x
  3. Step 3: Cross multiply
    129,859.90x = 194,655.45 × 70,570.30
  4. Step 4: Simplify right side
    129,859.90x = 13,736,893,503.14
  5. Step 5: Solve for x
    x = 13,736,893,503.14/129,859.90
  6. Step 6: Final answer
    x = 105,782.41

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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.