Home / 103,674.09-155,420.40-86,051.34

Finding the Fourth Proportional to 103,674.09, 155,420.40 and 86,051.34

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Solution

The fourth proportional to 103,674.09, 155,420.40 and 86,051.34 is: 129,001.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,674.09 : 155,420.40 = 86,051.34 : x
  2. Step 2: Convert to fraction form
    103,674.09/155,420.40 = 86,051.34/x
  3. Step 3: Cross multiply
    103,674.09x = 155,420.40 × 86,051.34
  4. Step 4: Simplify right side
    103,674.09x = 13,374,133,683.34
  5. Step 5: Solve for x
    x = 13,374,133,683.34/103,674.09
  6. Step 6: Final answer
    x = 129,001.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.