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Finding the Fourth Proportional to 260,361.06, 390,401.10 and 118,128.71

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Solution

The fourth proportional to 260,361.06, 390,401.10 and 118,128.71 is: 177,129.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,361.06 : 390,401.10 = 118,128.71 : x
  2. Step 2: Convert to fraction form
    260,361.06/390,401.10 = 118,128.71/x
  3. Step 3: Cross multiply
    260,361.06x = 390,401.10 × 118,128.71
  4. Step 4: Simplify right side
    260,361.06x = 46,117,576,373.58
  5. Step 5: Solve for x
    x = 46,117,576,373.58/260,361.06
  6. Step 6: Final answer
    x = 177,129.32

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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.