Home / 105,068.40-144,811.80-90,138.48

Finding the Fourth Proportional to 105,068.40, 144,811.80 and 90,138.48

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Solution

The fourth proportional to 105,068.40, 144,811.80 and 90,138.48 is: 124,234.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,068.40 : 144,811.80 = 90,138.48 : x
  2. Step 2: Convert to fraction form
    105,068.40/144,811.80 = 90,138.48/x
  3. Step 3: Cross multiply
    105,068.40x = 144,811.80 × 90,138.48
  4. Step 4: Simplify right side
    105,068.40x = 13,053,115,538.06
  5. Step 5: Solve for x
    x = 13,053,115,538.06/105,068.40
  6. Step 6: Final answer
    x = 124,234.46

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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.