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Finding the Fourth Proportional to 130,008.60, 195,031.80 and 55,128.60

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Solution

The fourth proportional to 130,008.60, 195,031.80 and 55,128.60 is: 82,700.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,008.60 : 195,031.80 = 55,128.60 : x
  2. Step 2: Convert to fraction form
    130,008.60/195,031.80 = 55,128.60/x
  3. Step 3: Cross multiply
    130,008.60x = 195,031.80 × 55,128.60
  4. Step 4: Simplify right side
    130,008.60x = 10,751,830,089.48
  5. Step 5: Solve for x
    x = 10,751,830,089.48/130,008.60
  6. Step 6: Final answer
    x = 82,700.91

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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.