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Finding the Fourth Proportional to 158,384.64, 218,509.92 and 90,405.40

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Solution

The fourth proportional to 158,384.64, 218,509.92 and 90,405.40 is: 124,724.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,384.64 : 218,509.92 = 90,405.40 : x
  2. Step 2: Convert to fraction form
    158,384.64/218,509.92 = 90,405.40/x
  3. Step 3: Cross multiply
    158,384.64x = 218,509.92 × 90,405.40
  4. Step 4: Simplify right side
    158,384.64x = 19,754,476,721.57
  5. Step 5: Solve for x
    x = 19,754,476,721.57/158,384.64
  6. Step 6: Final answer
    x = 124,724.70

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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.