Home / 120,386.93-166,136.28-72,038.57

Finding the Fourth Proportional to 120,386.93, 166,136.28 and 72,038.57

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Solution

The fourth proportional to 120,386.93, 166,136.28 and 72,038.57 is: 99,414.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,386.93 : 166,136.28 = 72,038.57 : x
  2. Step 2: Convert to fraction form
    120,386.93/166,136.28 = 72,038.57/x
  3. Step 3: Cross multiply
    120,386.93x = 166,136.28 × 72,038.57
  4. Step 4: Simplify right side
    120,386.93x = 11,968,220,036.32
  5. Step 5: Solve for x
    x = 11,968,220,036.32/120,386.93
  6. Step 6: Final answer
    x = 99,414.61

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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.