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Finding the Fourth Proportional to 145,643.40, 218,465.10 and 52,115.40

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Solution

The fourth proportional to 145,643.40, 218,465.10 and 52,115.40 is: 78,173.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,643.40 : 218,465.10 = 52,115.40 : x
  2. Step 2: Convert to fraction form
    145,643.40/218,465.10 = 52,115.40/x
  3. Step 3: Cross multiply
    145,643.40x = 218,465.10 × 52,115.40
  4. Step 4: Simplify right side
    145,643.40x = 11,385,396,072.54
  5. Step 5: Solve for x
    x = 11,385,396,072.54/145,643.40
  6. Step 6: Final answer
    x = 78,173.10

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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.