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Finding the Fourth Proportional to 258,068.71, 387,102.92 and 80,590.93

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Solution

The fourth proportional to 258,068.71, 387,102.92 and 80,590.93 is: 120,886.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,068.71 : 387,102.92 = 80,590.93 : x
  2. Step 2: Convert to fraction form
    258,068.71/387,102.92 = 80,590.93/x
  3. Step 3: Cross multiply
    258,068.71x = 387,102.92 × 80,590.93
  4. Step 4: Simplify right side
    258,068.71x = 31,196,984,328.52
  5. Step 5: Solve for x
    x = 31,196,984,328.52/258,068.71
  6. Step 6: Final answer
    x = 120,886.35

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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.