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Finding the Fourth Proportional to 387,745.16, 581,616.86 and 121,525.96

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Solution

The fourth proportional to 387,745.16, 581,616.86 and 121,525.96 is: 182,288.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,745.16 : 581,616.86 = 121,525.96 : x
  2. Step 2: Convert to fraction form
    387,745.16/581,616.86 = 121,525.96/x
  3. Step 3: Cross multiply
    387,745.16x = 581,616.86 × 121,525.96
  4. Step 4: Simplify right side
    387,745.16x = 70,681,547,263.69
  5. Step 5: Solve for x
    x = 70,681,547,263.69/387,745.16
  6. Step 6: Final answer
    x = 182,288.66

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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.