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Finding the Fourth Proportional to 158,353.16, 218,530.89 and 90,368.78

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Solution

The fourth proportional to 158,353.16, 218,530.89 and 90,368.78 is: 124,710.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,353.16 : 218,530.89 = 90,368.78 : x
  2. Step 2: Convert to fraction form
    158,353.16/218,530.89 = 90,368.78/x
  3. Step 3: Cross multiply
    158,353.16x = 218,530.89 × 90,368.78
  4. Step 4: Simplify right side
    158,353.16x = 19,748,368,828.96
  5. Step 5: Solve for x
    x = 19,748,368,828.96/158,353.16
  6. Step 6: Final answer
    x = 124,710.93

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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.