Home / 145,112.51-200,244.27-81,438

Finding the Fourth Proportional to 145,112.51, 200,244.27 and 81,438

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Solution

The fourth proportional to 145,112.51, 200,244.27 and 81,438 is: 112,378.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,112.51 : 200,244.27 = 81,438 : x
  2. Step 2: Convert to fraction form
    145,112.51/200,244.27 = 81,438/x
  3. Step 3: Cross multiply
    145,112.51x = 200,244.27 × 81,438
  4. Step 4: Simplify right side
    145,112.51x = 16,307,492,860.26
  5. Step 5: Solve for x
    x = 16,307,492,860.26/145,112.51
  6. Step 6: Final answer
    x = 112,378.27

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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.