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Finding the Fourth Proportional to 153,712.59, 212,124.57 and 85,733.88

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Solution

The fourth proportional to 153,712.59, 212,124.57 and 85,733.88 is: 118,313.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,712.59 : 212,124.57 = 85,733.88 : x
  2. Step 2: Convert to fraction form
    153,712.59/212,124.57 = 85,733.88/x
  3. Step 3: Cross multiply
    153,712.59x = 212,124.57 × 85,733.88
  4. Step 4: Simplify right side
    153,712.59x = 18,186,262,429.43
  5. Step 5: Solve for x
    x = 18,186,262,429.43/153,712.59
  6. Step 6: Final answer
    x = 118,313.42

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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.