Home / 137,901.12-190,303.44-78,285.12

Finding the Fourth Proportional to 137,901.12, 190,303.44 and 78,285.12

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Solution

The fourth proportional to 137,901.12, 190,303.44 and 78,285.12 is: 108,033.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,901.12 : 190,303.44 = 78,285.12 : x
  2. Step 2: Convert to fraction form
    137,901.12/190,303.44 = 78,285.12/x
  3. Step 3: Cross multiply
    137,901.12x = 190,303.44 × 78,285.12
  4. Step 4: Simplify right side
    137,901.12x = 14,897,927,636.81
  5. Step 5: Solve for x
    x = 14,897,927,636.81/137,901.12
  6. Step 6: Final answer
    x = 108,033.41

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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.