Home / 158,129.16-218,223.41-86,509.19

Finding the Fourth Proportional to 158,129.16, 218,223.41 and 86,509.19

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Solution

The fourth proportional to 158,129.16, 218,223.41 and 86,509.19 is: 119,385.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,129.16 : 218,223.41 = 86,509.19 : x
  2. Step 2: Convert to fraction form
    158,129.16/218,223.41 = 86,509.19/x
  3. Step 3: Cross multiply
    158,129.16x = 218,223.41 × 86,509.19
  4. Step 4: Simplify right side
    158,129.16x = 18,878,328,914.47
  5. Step 5: Solve for x
    x = 18,878,328,914.47/158,129.16
  6. Step 6: Final answer
    x = 119,385.50

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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.