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Finding the Fourth Proportional to 154,079.57, 212,657.69 and 99,698.69

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Solution

The fourth proportional to 154,079.57, 212,657.69 and 99,698.69 is: 137,602.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,079.57 : 212,657.69 = 99,698.69 : x
  2. Step 2: Convert to fraction form
    154,079.57/212,657.69 = 99,698.69/x
  3. Step 3: Cross multiply
    154,079.57x = 212,657.69 × 99,698.69
  4. Step 4: Simplify right side
    154,079.57x = 21,201,692,297.38
  5. Step 5: Solve for x
    x = 21,201,692,297.38/154,079.57
  6. Step 6: Final answer
    x = 137,602.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.