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Finding the Fourth Proportional to 218,957.61, 302,170.46 and 138,355.72

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Solution

The fourth proportional to 218,957.61, 302,170.46 and 138,355.72 is: 190,936.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,957.61 : 302,170.46 = 138,355.72 : x
  2. Step 2: Convert to fraction form
    218,957.61/302,170.46 = 138,355.72/x
  3. Step 3: Cross multiply
    218,957.61x = 302,170.46 × 138,355.72
  4. Step 4: Simplify right side
    218,957.61x = 41,807,011,931.49
  5. Step 5: Solve for x
    x = 41,807,011,931.49/218,957.61
  6. Step 6: Final answer
    x = 190,936.56

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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.