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Finding the Fourth Proportional to 130,006.80, 194,621.40 and 77,389.20

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Solution

The fourth proportional to 130,006.80, 194,621.40 and 77,389.20 is: 115,852.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,006.80 : 194,621.40 = 77,389.20 : x
  2. Step 2: Convert to fraction form
    130,006.80/194,621.40 = 77,389.20/x
  3. Step 3: Cross multiply
    130,006.80x = 194,621.40 × 77,389.20
  4. Step 4: Simplify right side
    130,006.80x = 15,061,594,448.88
  5. Step 5: Solve for x
    x = 15,061,594,448.88/130,006.80
  6. Step 6: Final answer
    x = 115,852.36

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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.