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Finding the Fourth Proportional to 258,129.70, 387,293.84 and 124,999.72

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Solution

The fourth proportional to 258,129.70, 387,293.84 and 124,999.72 is: 187,547.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,129.70 : 387,293.84 = 124,999.72 : x
  2. Step 2: Convert to fraction form
    258,129.70/387,293.84 = 124,999.72/x
  3. Step 3: Cross multiply
    258,129.70x = 387,293.84 × 124,999.72
  4. Step 4: Simplify right side
    258,129.70x = 48,411,621,557.72
  5. Step 5: Solve for x
    x = 48,411,621,557.72/258,129.70
  6. Step 6: Final answer
    x = 187,547.66

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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.