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Finding the Fourth Proportional to 153,724, 212,314.08 and 103,335.52

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Solution

The fourth proportional to 153,724, 212,314.08 and 103,335.52 is: 142,720.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,724 : 212,314.08 = 103,335.52 : x
  2. Step 2: Convert to fraction form
    153,724/212,314.08 = 103,335.52/x
  3. Step 3: Cross multiply
    153,724x = 212,314.08 × 103,335.52
  4. Step 4: Simplify right side
    153,724x = 21,939,585,860.12
  5. Step 5: Solve for x
    x = 21,939,585,860.12/153,724
  6. Step 6: Final answer
    x = 142,720.63

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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.