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Finding the Fourth Proportional to 258,493.68, 387,740.58 and 81,000.66

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Solution

The fourth proportional to 258,493.68, 387,740.58 and 81,000.66 is: 121,501.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,493.68 : 387,740.58 = 81,000.66 : x
  2. Step 2: Convert to fraction form
    258,493.68/387,740.58 = 81,000.66/x
  3. Step 3: Cross multiply
    258,493.68x = 387,740.58 × 81,000.66
  4. Step 4: Simplify right side
    258,493.68x = 31,407,242,888.78
  5. Step 5: Solve for x
    x = 31,407,242,888.78/258,493.68
  6. Step 6: Final answer
    x = 121,501.01

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1.5x scale

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.