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Finding the Fourth Proportional to 129,686.08, 178,966.72 and 70,070.08

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Solution

The fourth proportional to 129,686.08, 178,966.72 and 70,070.08 is: 96,696.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,686.08 : 178,966.72 = 70,070.08 : x
  2. Step 2: Convert to fraction form
    129,686.08/178,966.72 = 70,070.08/x
  3. Step 3: Cross multiply
    129,686.08x = 178,966.72 × 70,070.08
  4. Step 4: Simplify right side
    129,686.08x = 12,540,212,387.74
  5. Step 5: Solve for x
    x = 12,540,212,387.74/129,686.08
  6. Step 6: Final answer
    x = 96,696.67

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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.