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Finding the Fourth Proportional to 158,386.66, 218,567.89 and 90,407.14

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Solution

The fourth proportional to 158,386.66, 218,567.89 and 90,407.14 is: 124,758.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,386.66 : 218,567.89 = 90,407.14 : x
  2. Step 2: Convert to fraction form
    158,386.66/218,567.89 = 90,407.14/x
  3. Step 3: Cross multiply
    158,386.66x = 218,567.89 × 90,407.14
  4. Step 4: Simplify right side
    158,386.66x = 19,760,097,830.73
  5. Step 5: Solve for x
    x = 19,760,097,830.73/158,386.66
  6. Step 6: Final answer
    x = 124,758.60

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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.