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Finding the Fourth Proportional to 129,520, 178,737.60 and 75,802.42

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Solution

The fourth proportional to 129,520, 178,737.60 and 75,802.42 is: 104,607.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,520 : 178,737.60 = 75,802.42 : x
  2. Step 2: Convert to fraction form
    129,520/178,737.60 = 75,802.42/x
  3. Step 3: Cross multiply
    129,520x = 178,737.60 × 75,802.42
  4. Step 4: Simplify right side
    129,520x = 13,548,742,624.99
  5. Step 5: Solve for x
    x = 13,548,742,624.99/129,520
  6. Step 6: Final answer
    x = 104,607.34

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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.