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Finding the Fourth Proportional to 158,690.61, 219,006.90 and 87,084.63

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Solution

The fourth proportional to 158,690.61, 219,006.90 and 87,084.63 is: 120,184.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,690.61 : 219,006.90 = 87,084.63 : x
  2. Step 2: Convert to fraction form
    158,690.61/219,006.90 = 87,084.63/x
  3. Step 3: Cross multiply
    158,690.61x = 219,006.90 × 87,084.63
  4. Step 4: Simplify right side
    158,690.61x = 19,072,134,853.95
  5. Step 5: Solve for x
    x = 19,072,134,853.95/158,690.61
  6. Step 6: Final answer
    x = 120,184.39

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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.