Home / 153,968.72-212,430.40-89,425.51

Finding the Fourth Proportional to 153,968.72, 212,430.40 and 89,425.51

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Solution

The fourth proportional to 153,968.72, 212,430.40 and 89,425.51 is: 123,380.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,968.72 : 212,430.40 = 89,425.51 : x
  2. Step 2: Convert to fraction form
    153,968.72/212,430.40 = 89,425.51/x
  3. Step 3: Cross multiply
    153,968.72x = 212,430.40 × 89,425.51
  4. Step 4: Simplify right side
    153,968.72x = 18,996,696,104.86
  5. Step 5: Solve for x
    x = 18,996,696,104.86/153,968.72
  6. Step 6: Final answer
    x = 123,380.23

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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.