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Finding the Fourth Proportional to 153,990.25, 212,506.55 and 83,334.25

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Solution

The fourth proportional to 153,990.25, 212,506.55 and 83,334.25 is: 115,001.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,990.25 : 212,506.55 = 83,334.25 : x
  2. Step 2: Convert to fraction form
    153,990.25/212,506.55 = 83,334.25/x
  3. Step 3: Cross multiply
    153,990.25x = 212,506.55 × 83,334.25
  4. Step 4: Simplify right side
    153,990.25x = 17,709,073,547.67
  5. Step 5: Solve for x
    x = 17,709,073,547.67/153,990.25
  6. Step 6: Final answer
    x = 115,001.27

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1.5x scale

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.