Home / 115,403.36-159,065.99-77,148.93

Finding the Fourth Proportional to 115,403.36, 159,065.99 and 77,148.93

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Solution

The fourth proportional to 115,403.36, 159,065.99 and 77,148.93 is: 106,338.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,403.36 : 159,065.99 = 77,148.93 : x
  2. Step 2: Convert to fraction form
    115,403.36/159,065.99 = 77,148.93/x
  3. Step 3: Cross multiply
    115,403.36x = 159,065.99 × 77,148.93
  4. Step 4: Simplify right side
    115,403.36x = 12,271,771,138.64
  5. Step 5: Solve for x
    x = 12,271,771,138.64/115,403.36
  6. Step 6: Final answer
    x = 106,338.07

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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.