Home / 105,557.88-145,663.20-57,811.80

Finding the Fourth Proportional to 105,557.88, 145,663.20 and 57,811.80

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Solution

The fourth proportional to 105,557.88, 145,663.20 and 57,811.80 is: 79,776.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,557.88 : 145,663.20 = 57,811.80 : x
  2. Step 2: Convert to fraction form
    105,557.88/145,663.20 = 57,811.80/x
  3. Step 3: Cross multiply
    105,557.88x = 145,663.20 × 57,811.80
  4. Step 4: Simplify right side
    105,557.88x = 8,421,051,785.76
  5. Step 5: Solve for x
    x = 8,421,051,785.76/105,557.88
  6. Step 6: Final answer
    x = 79,776.63

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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.