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Finding the Fourth Proportional to 103,289, 142,563.12 and 63,036.06

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Solution

The fourth proportional to 103,289, 142,563.12 and 63,036.06 is: 87,004.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,289 : 142,563.12 = 63,036.06 : x
  2. Step 2: Convert to fraction form
    103,289/142,563.12 = 63,036.06/x
  3. Step 3: Cross multiply
    103,289x = 142,563.12 × 63,036.06
  4. Step 4: Simplify right side
    103,289x = 8,986,617,386.11
  5. Step 5: Solve for x
    x = 8,986,617,386.11/103,289
  6. Step 6: Final answer
    x = 87,004.59

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1.5x scale

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.