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Finding the Fourth Proportional to 105,877.77, 158,055.06 and 90,721.68

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Solution

The fourth proportional to 105,877.77, 158,055.06 and 90,721.68 is: 135,429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,877.77 : 158,055.06 = 90,721.68 : x
  2. Step 2: Convert to fraction form
    105,877.77/158,055.06 = 90,721.68/x
  3. Step 3: Cross multiply
    105,877.77x = 158,055.06 × 90,721.68
  4. Step 4: Simplify right side
    105,877.77x = 14,339,020,575.70
  5. Step 5: Solve for x
    x = 14,339,020,575.70/105,877.77
  6. Step 6: Final answer
    x = 135,429.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.