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Finding the Fourth Proportional to 129,430.88, 178,669.72 and 87,014.01

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Solution

The fourth proportional to 129,430.88, 178,669.72 and 87,014.01 is: 120,116.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,430.88 : 178,669.72 = 87,014.01 : x
  2. Step 2: Convert to fraction form
    129,430.88/178,669.72 = 87,014.01/x
  3. Step 3: Cross multiply
    129,430.88x = 178,669.72 × 87,014.01
  4. Step 4: Simplify right side
    129,430.88x = 15,546,768,802.78
  5. Step 5: Solve for x
    x = 15,546,768,802.78/129,430.88
  6. Step 6: Final answer
    x = 120,116.38

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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.