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Finding the Fourth Proportional to 162,547.70, 243,821.55 and 83,815.70

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Solution

The fourth proportional to 162,547.70, 243,821.55 and 83,815.70 is: 125,723.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,547.70 : 243,821.55 = 83,815.70 : x
  2. Step 2: Convert to fraction form
    162,547.70/243,821.55 = 83,815.70/x
  3. Step 3: Cross multiply
    162,547.70x = 243,821.55 × 83,815.70
  4. Step 4: Simplify right side
    162,547.70x = 20,436,073,888.34
  5. Step 5: Solve for x
    x = 20,436,073,888.34/162,547.70
  6. Step 6: Final answer
    x = 125,723.55

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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.