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Finding the Fourth Proportional to 103,430.18, 142,749.04 and 63,167.30

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Solution

The fourth proportional to 103,430.18, 142,749.04 and 63,167.30 is: 87,180.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.18 : 142,749.04 = 63,167.30 : x
  2. Step 2: Convert to fraction form
    103,430.18/142,749.04 = 63,167.30/x
  3. Step 3: Cross multiply
    103,430.18x = 142,749.04 × 63,167.30
  4. Step 4: Simplify right side
    103,430.18x = 9,017,071,434.39
  5. Step 5: Solve for x
    x = 9,017,071,434.39/103,430.18
  6. Step 6: Final answer
    x = 87,180.27

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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.