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Finding the Fourth Proportional to 152,670.63, 210,688.85 and 84,685.39

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Solution

The fourth proportional to 152,670.63, 210,688.85 and 84,685.39 is: 116,867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,670.63 : 210,688.85 = 84,685.39 : x
  2. Step 2: Convert to fraction form
    152,670.63/210,688.85 = 84,685.39/x
  3. Step 3: Cross multiply
    152,670.63x = 210,688.85 × 84,685.39
  4. Step 4: Simplify right side
    152,670.63x = 17,842,265,954.03
  5. Step 5: Solve for x
    x = 17,842,265,954.03/152,670.63
  6. Step 6: Final answer
    x = 116,867.70

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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.