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Finding the Fourth Proportional to 130,908.81, 180,654.16 and 71,292.81

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Solution

The fourth proportional to 130,908.81, 180,654.16 and 71,292.81 is: 98,384.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,908.81 : 180,654.16 = 71,292.81 : x
  2. Step 2: Convert to fraction form
    130,908.81/180,654.16 = 71,292.81/x
  3. Step 3: Cross multiply
    130,908.81x = 180,654.16 × 71,292.81
  4. Step 4: Simplify right side
    130,908.81x = 12,879,342,704.59
  5. Step 5: Solve for x
    x = 12,879,342,704.59/130,908.81
  6. Step 6: Final answer
    x = 98,384.08

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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.