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Finding the Fourth Proportional to 145,320.60, 217,980.90 and 103,330.20

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Solution

The fourth proportional to 145,320.60, 217,980.90 and 103,330.20 is: 154,995.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,320.60 : 217,980.90 = 103,330.20 : x
  2. Step 2: Convert to fraction form
    145,320.60/217,980.90 = 103,330.20/x
  3. Step 3: Cross multiply
    145,320.60x = 217,980.90 × 103,330.20
  4. Step 4: Simplify right side
    145,320.60x = 22,524,009,993.18
  5. Step 5: Solve for x
    x = 22,524,009,993.18/145,320.60
  6. Step 6: Final answer
    x = 154,995.30

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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.