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Finding the Fourth Proportional to 92,852.70, 139,279.05 and 86,947.80

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Solution

The fourth proportional to 92,852.70, 139,279.05 and 86,947.80 is: 130,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,852.70 : 139,279.05 = 86,947.80 : x
  2. Step 2: Convert to fraction form
    92,852.70/139,279.05 = 86,947.80/x
  3. Step 3: Cross multiply
    92,852.70x = 139,279.05 × 86,947.80
  4. Step 4: Simplify right side
    92,852.70x = 12,110,006,983.59
  5. Step 5: Solve for x
    x = 12,110,006,983.59/92,852.70
  6. Step 6: Final answer
    x = 130,421.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.