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Finding the Fourth Proportional to 163,387.40, 245,081.10 and 137,143.40

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Solution

The fourth proportional to 163,387.40, 245,081.10 and 137,143.40 is: 205,715.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,387.40 : 245,081.10 = 137,143.40 : x
  2. Step 2: Convert to fraction form
    163,387.40/245,081.10 = 137,143.40/x
  3. Step 3: Cross multiply
    163,387.40x = 245,081.10 × 137,143.40
  4. Step 4: Simplify right side
    163,387.40x = 33,611,255,329.74
  5. Step 5: Solve for x
    x = 33,611,255,329.74/163,387.40
  6. Step 6: Final answer
    x = 205,715.10

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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.