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Finding the Fourth Proportional to 153,831.52, 212,230.62 and 90,146.08

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Solution

The fourth proportional to 153,831.52, 212,230.62 and 90,146.08 is: 124,368.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,831.52 : 212,230.62 = 90,146.08 : x
  2. Step 2: Convert to fraction form
    153,831.52/212,230.62 = 90,146.08/x
  3. Step 3: Cross multiply
    153,831.52x = 212,230.62 × 90,146.08
  4. Step 4: Simplify right side
    153,831.52x = 19,131,758,448.97
  5. Step 5: Solve for x
    x = 19,131,758,448.97/153,831.52
  6. Step 6: Final answer
    x = 124,368.26

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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.