Home / 138,623.51-191,292.48-78,190.55

Finding the Fourth Proportional to 138,623.51, 191,292.48 and 78,190.55

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Solution

The fourth proportional to 138,623.51, 191,292.48 and 78,190.55 is: 107,898.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,623.51 : 191,292.48 = 78,190.55 : x
  2. Step 2: Convert to fraction form
    138,623.51/191,292.48 = 78,190.55/x
  3. Step 3: Cross multiply
    138,623.51x = 191,292.48 × 78,190.55
  4. Step 4: Simplify right side
    138,623.51x = 14,957,264,222.06
  5. Step 5: Solve for x
    x = 14,957,264,222.06/138,623.51
  6. Step 6: Final answer
    x = 107,898.47

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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.