Home / 145,111.20-200,242.47-81,436.70

Finding the Fourth Proportional to 145,111.20, 200,242.47 and 81,436.70

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Solution

The fourth proportional to 145,111.20, 200,242.47 and 81,436.70 is: 112,376.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,111.20 : 200,242.47 = 81,436.70 : x
  2. Step 2: Convert to fraction form
    145,111.20/200,242.47 = 81,436.70/x
  3. Step 3: Cross multiply
    145,111.20x = 200,242.47 × 81,436.70
  4. Step 4: Simplify right side
    145,111.20x = 16,307,084,955.44
  5. Step 5: Solve for x
    x = 16,307,084,955.44/145,111.20
  6. Step 6: Final answer
    x = 112,376.47

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1.5x scale

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.