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Finding the Fourth Proportional to 145,246.80, 217,870.20 and 121,918.80

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Solution

The fourth proportional to 145,246.80, 217,870.20 and 121,918.80 is: 182,878.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,246.80 : 217,870.20 = 121,918.80 : x
  2. Step 2: Convert to fraction form
    145,246.80/217,870.20 = 121,918.80/x
  3. Step 3: Cross multiply
    145,246.80x = 217,870.20 × 121,918.80
  4. Step 4: Simplify right side
    145,246.80x = 26,562,473,339.76
  5. Step 5: Solve for x
    x = 26,562,473,339.76/145,246.80
  6. Step 6: Final answer
    x = 182,878.20

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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.