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Finding the Fourth Proportional to 86,963.90, 130,470.75 and 42,603.64

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Solution

The fourth proportional to 86,963.90, 130,470.75 and 42,603.64 is: 63,917.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,963.90 : 130,470.75 = 42,603.64 : x
  2. Step 2: Convert to fraction form
    86,963.90/130,470.75 = 42,603.64/x
  3. Step 3: Cross multiply
    86,963.90x = 130,470.75 × 42,603.64
  4. Step 4: Simplify right side
    86,963.90x = 5,558,528,537.35
  5. Step 5: Solve for x
    x = 5,558,528,537.35/86,963.90
  6. Step 6: Final answer
    x = 63,917.66

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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.