Home / 112,988.72-155,997.47-70,013.81

Finding the Fourth Proportional to 112,988.72, 155,997.47 and 70,013.81

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Solution

The fourth proportional to 112,988.72, 155,997.47 and 70,013.81 is: 96,664.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,988.72 : 155,997.47 = 70,013.81 : x
  2. Step 2: Convert to fraction form
    112,988.72/155,997.47 = 70,013.81/x
  3. Step 3: Cross multiply
    112,988.72x = 155,997.47 × 70,013.81
  4. Step 4: Simplify right side
    112,988.72x = 10,921,977,225.06
  5. Step 5: Solve for x
    x = 10,921,977,225.06/112,988.72
  6. Step 6: Final answer
    x = 96,664.32

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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.