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Finding the Fourth Proportional to 209,915.80, 314,873.70 and 121,123.60

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Solution

The fourth proportional to 209,915.80, 314,873.70 and 121,123.60 is: 181,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,915.80 : 314,873.70 = 121,123.60 : x
  2. Step 2: Convert to fraction form
    209,915.80/314,873.70 = 121,123.60/x
  3. Step 3: Cross multiply
    209,915.80x = 314,873.70 × 121,123.60
  4. Step 4: Simplify right side
    209,915.80x = 38,138,636,089.32
  5. Step 5: Solve for x
    x = 38,138,636,089.32/209,915.80
  6. Step 6: Final answer
    x = 181,685.40

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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.