Home / 123,438.29-170,276.63-100,492.80

Finding the Fourth Proportional to 123,438.29, 170,276.63 and 100,492.80

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Solution

The fourth proportional to 123,438.29, 170,276.63 and 100,492.80 is: 138,624.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,438.29 : 170,276.63 = 100,492.80 : x
  2. Step 2: Convert to fraction form
    123,438.29/170,276.63 = 100,492.80/x
  3. Step 3: Cross multiply
    123,438.29x = 170,276.63 × 100,492.80
  4. Step 4: Simplify right side
    123,438.29x = 17,111,574,747.53
  5. Step 5: Solve for x
    x = 17,111,574,747.53/123,438.29
  6. Step 6: Final answer
    x = 138,624.53

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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.