Home / 126,561.02-174,688.85-78,786

Finding the Fourth Proportional to 126,561.02, 174,688.85 and 78,786

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Solution

The fourth proportional to 126,561.02, 174,688.85 and 78,786 is: 108,746.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,561.02 : 174,688.85 = 78,786 : x
  2. Step 2: Convert to fraction form
    126,561.02/174,688.85 = 78,786/x
  3. Step 3: Cross multiply
    126,561.02x = 174,688.85 × 78,786
  4. Step 4: Simplify right side
    126,561.02x = 13,763,035,933.07
  5. Step 5: Solve for x
    x = 13,763,035,933.07/126,561.02
  6. Step 6: Final answer
    x = 108,746.25

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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.