Home / 138,400.86-190,953.68-77,950.38

Finding the Fourth Proportional to 138,400.86, 190,953.68 and 77,950.38

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Solution

The fourth proportional to 138,400.86, 190,953.68 and 77,950.38 is: 107,549.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,400.86 : 190,953.68 = 77,950.38 : x
  2. Step 2: Convert to fraction form
    138,400.86/190,953.68 = 77,950.38/x
  3. Step 3: Cross multiply
    138,400.86x = 190,953.68 × 77,950.38
  4. Step 4: Simplify right side
    138,400.86x = 14,884,911,918.40
  5. Step 5: Solve for x
    x = 14,884,911,918.40/138,400.86
  6. Step 6: Final answer
    x = 107,549.27

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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.