Home / 105,555.42-145,666.53-57,811.77

Finding the Fourth Proportional to 105,555.42, 145,666.53 and 57,811.77

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Solution

The fourth proportional to 105,555.42, 145,666.53 and 57,811.77 is: 79,780.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,555.42 : 145,666.53 = 57,811.77 : x
  2. Step 2: Convert to fraction form
    105,555.42/145,666.53 = 57,811.77/x
  3. Step 3: Cross multiply
    105,555.42x = 145,666.53 × 57,811.77
  4. Step 4: Simplify right side
    105,555.42x = 8,421,239,929.06
  5. Step 5: Solve for x
    x = 8,421,239,929.06/105,555.42
  6. Step 6: Final answer
    x = 79,780.27

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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.