Home / 153,918.50-212,442.89-90,276.80

Finding the Fourth Proportional to 153,918.50, 212,442.89 and 90,276.80

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Solution

The fourth proportional to 153,918.50, 212,442.89 and 90,276.80 is: 124,602.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,918.50 : 212,442.89 = 90,276.80 : x
  2. Step 2: Convert to fraction form
    153,918.50/212,442.89 = 90,276.80/x
  3. Step 3: Cross multiply
    153,918.50x = 212,442.89 × 90,276.80
  4. Step 4: Simplify right side
    153,918.50x = 19,178,664,291.95
  5. Step 5: Solve for x
    x = 19,178,664,291.95/153,918.50
  6. Step 6: Final answer
    x = 124,602.72

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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.