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Finding the Fourth Proportional to 76,587.54, 105,689.79 and 43,053.54

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Solution

The fourth proportional to 76,587.54, 105,689.79 and 43,053.54 is: 59,413.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,587.54 : 105,689.79 = 43,053.54 : x
  2. Step 2: Convert to fraction form
    76,587.54/105,689.79 = 43,053.54/x
  3. Step 3: Cross multiply
    76,587.54x = 105,689.79 × 43,053.54
  4. Step 4: Simplify right side
    76,587.54x = 4,550,319,601.36
  5. Step 5: Solve for x
    x = 4,550,319,601.36/76,587.54
  6. Step 6: Final answer
    x = 59,413.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.