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Finding the Fourth Proportional to 152,643.60, 210,660.75 and 84,682.45

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Solution

The fourth proportional to 152,643.60, 210,660.75 and 84,682.45 is: 116,868.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,643.60 : 210,660.75 = 84,682.45 : x
  2. Step 2: Convert to fraction form
    152,643.60/210,660.75 = 84,682.45/x
  3. Step 3: Cross multiply
    152,643.60x = 210,660.75 × 84,682.45
  4. Step 4: Simplify right side
    152,643.60x = 17,839,268,428.84
  5. Step 5: Solve for x
    x = 17,839,268,428.84/152,643.60
  6. Step 6: Final answer
    x = 116,868.76

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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.