Home / 81,215.85-112,088.17-45,407.98

Finding the Fourth Proportional to 81,215.85, 112,088.17 and 45,407.98

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Solution

The fourth proportional to 81,215.85, 112,088.17 and 45,407.98 is: 62,668.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,215.85 : 112,088.17 = 45,407.98 : x
  2. Step 2: Convert to fraction form
    81,215.85/112,088.17 = 45,407.98/x
  3. Step 3: Cross multiply
    81,215.85x = 112,088.17 × 45,407.98
  4. Step 4: Simplify right side
    81,215.85x = 5,089,697,381.60
  5. Step 5: Solve for x
    x = 5,089,697,381.60/81,215.85
  6. Step 6: Final answer
    x = 62,668.77

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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.