Home / 74,719.40-112,208.70-72,386.60

Finding the Fourth Proportional to 74,719.40, 112,208.70 and 72,386.60

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Solution

The fourth proportional to 74,719.40, 112,208.70 and 72,386.60 is: 108,705.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,719.40 : 112,208.70 = 72,386.60 : x
  2. Step 2: Convert to fraction form
    74,719.40/112,208.70 = 72,386.60/x
  3. Step 3: Cross multiply
    74,719.40x = 112,208.70 × 72,386.60
  4. Step 4: Simplify right side
    74,719.40x = 8,122,406,283.42
  5. Step 5: Solve for x
    x = 8,122,406,283.42/74,719.40
  6. Step 6: Final answer
    x = 108,705.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.