Home / 127,970.20-191,696.10-72,501.40

Finding the Fourth Proportional to 127,970.20, 191,696.10 and 72,501.40

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Solution

The fourth proportional to 127,970.20, 191,696.10 and 72,501.40 is: 108,605.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,970.20 : 191,696.10 = 72,501.40 : x
  2. Step 2: Convert to fraction form
    127,970.20/191,696.10 = 72,501.40/x
  3. Step 3: Cross multiply
    127,970.20x = 191,696.10 × 72,501.40
  4. Step 4: Simplify right side
    127,970.20x = 13,898,235,624.54
  5. Step 5: Solve for x
    x = 13,898,235,624.54/127,970.20
  6. Step 6: Final answer
    x = 108,605.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.