Home / 115,140-158,946.57-81,176.16

Finding the Fourth Proportional to 115,140, 158,946.57 and 81,176.16

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Solution

The fourth proportional to 115,140, 158,946.57 and 81,176.16 is: 112,060.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,140 : 158,946.57 = 81,176.16 : x
  2. Step 2: Convert to fraction form
    115,140/158,946.57 = 81,176.16/x
  3. Step 3: Cross multiply
    115,140x = 158,946.57 × 81,176.16
  4. Step 4: Simplify right side
    115,140x = 12,902,672,197.77
  5. Step 5: Solve for x
    x = 12,902,672,197.77/115,140
  6. Step 6: Final answer
    x = 112,060.73

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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.