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Finding the Fourth Proportional to 258,341.12, 387,482.88 and 89,832.32

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Solution

The fourth proportional to 258,341.12, 387,482.88 and 89,832.32 is: 134,738.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,341.12 : 387,482.88 = 89,832.32 : x
  2. Step 2: Convert to fraction form
    258,341.12/387,482.88 = 89,832.32/x
  3. Step 3: Cross multiply
    258,341.12x = 387,482.88 × 89,832.32
  4. Step 4: Simplify right side
    258,341.12x = 34,808,486,070.68
  5. Step 5: Solve for x
    x = 34,808,486,070.68/258,341.12
  6. Step 6: Final answer
    x = 134,738.47

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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.