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Finding the Fourth Proportional to 86,818.90, 130,228.35 and 85,897.30

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Solution

The fourth proportional to 86,818.90, 130,228.35 and 85,897.30 is: 128,845.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,818.90 : 130,228.35 = 85,897.30 : x
  2. Step 2: Convert to fraction form
    86,818.90/130,228.35 = 85,897.30/x
  3. Step 3: Cross multiply
    86,818.90x = 130,228.35 × 85,897.30
  4. Step 4: Simplify right side
    86,818.90x = 11,186,263,648.46
  5. Step 5: Solve for x
    x = 11,186,263,648.46/86,818.90
  6. Step 6: Final answer
    x = 128,845.95

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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.