Home / 90,813.28-136,239.12-28,490.08

Finding the Fourth Proportional to 90,813.28, 136,239.12 and 28,490.08

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Solution

The fourth proportional to 90,813.28, 136,239.12 and 28,490.08 is: 42,741.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,813.28 : 136,239.12 = 28,490.08 : x
  2. Step 2: Convert to fraction form
    90,813.28/136,239.12 = 28,490.08/x
  3. Step 3: Cross multiply
    90,813.28x = 136,239.12 × 28,490.08
  4. Step 4: Simplify right side
    90,813.28x = 3,881,463,427.93
  5. Step 5: Solve for x
    x = 3,881,463,427.93/90,813.28
  6. Step 6: Final answer
    x = 42,741.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.