Home / 136,840.79-188,817.75-76,401.72

Finding the Fourth Proportional to 136,840.79, 188,817.75 and 76,401.72

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Solution

The fourth proportional to 136,840.79, 188,817.75 and 76,401.72 is: 105,421.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,840.79 : 188,817.75 = 76,401.72 : x
  2. Step 2: Convert to fraction form
    136,840.79/188,817.75 = 76,401.72/x
  3. Step 3: Cross multiply
    136,840.79x = 188,817.75 × 76,401.72
  4. Step 4: Simplify right side
    136,840.79x = 14,426,000,866.53
  5. Step 5: Solve for x
    x = 14,426,000,866.53/136,840.79
  6. Step 6: Final answer
    x = 105,421.79

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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.