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Finding the Fourth Proportional to 129,303.01, 178,440.33 and 71,946.91

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Solution

The fourth proportional to 129,303.01, 178,440.33 and 71,946.91 is: 99,287.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,303.01 : 178,440.33 = 71,946.91 : x
  2. Step 2: Convert to fraction form
    129,303.01/178,440.33 = 71,946.91/x
  3. Step 3: Cross multiply
    129,303.01x = 178,440.33 × 71,946.91
  4. Step 4: Simplify right side
    129,303.01x = 12,838,230,362.88
  5. Step 5: Solve for x
    x = 12,838,230,362.88/129,303.01
  6. Step 6: Final answer
    x = 99,287.95

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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.