Home / 140,340.15-193,663.37-76,678.20

Finding the Fourth Proportional to 140,340.15, 193,663.37 and 76,678.20

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Solution

The fourth proportional to 140,340.15, 193,663.37 and 76,678.20 is: 105,812.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,340.15 : 193,663.37 = 76,678.20 : x
  2. Step 2: Convert to fraction form
    140,340.15/193,663.37 = 76,678.20/x
  3. Step 3: Cross multiply
    140,340.15x = 193,663.37 × 76,678.20
  4. Step 4: Simplify right side
    140,340.15x = 14,849,758,809.23
  5. Step 5: Solve for x
    x = 14,849,758,809.23/140,340.15
  6. Step 6: Final answer
    x = 105,812.62

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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.