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Finding the Fourth Proportional to 345,775.16, 518,662.86 and 109,141.80

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Solution

The fourth proportional to 345,775.16, 518,662.86 and 109,141.80 is: 163,712.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,775.16 : 518,662.86 = 109,141.80 : x
  2. Step 2: Convert to fraction form
    345,775.16/518,662.86 = 109,141.80/x
  3. Step 3: Cross multiply
    345,775.16x = 518,662.86 × 109,141.80
  4. Step 4: Simplify right side
    345,775.16x = 56,607,798,133.55
  5. Step 5: Solve for x
    x = 56,607,798,133.55/345,775.16
  6. Step 6: Final answer
    x = 163,712.74

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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.