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Finding the Fourth Proportional to 127,130.59, 190,459.94 and 91,032.53

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Solution

The fourth proportional to 127,130.59, 190,459.94 and 91,032.53 is: 136,379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,130.59 : 190,459.94 = 91,032.53 : x
  2. Step 2: Convert to fraction form
    127,130.59/190,459.94 = 91,032.53/x
  3. Step 3: Cross multiply
    127,130.59x = 190,459.94 × 91,032.53
  4. Step 4: Simplify right side
    127,130.59x = 17,338,049,746.69
  5. Step 5: Solve for x
    x = 17,338,049,746.69/127,130.59
  6. Step 6: Final answer
    x = 136,379.85

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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.