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Finding the Fourth Proportional to 101,970.90, 152,956.35 and 86,880.60

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Solution

The fourth proportional to 101,970.90, 152,956.35 and 86,880.60 is: 130,320.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,970.90 : 152,956.35 = 86,880.60 : x
  2. Step 2: Convert to fraction form
    101,970.90/152,956.35 = 86,880.60/x
  3. Step 3: Cross multiply
    101,970.90x = 152,956.35 × 86,880.60
  4. Step 4: Simplify right side
    101,970.90x = 13,288,939,461.81
  5. Step 5: Solve for x
    x = 13,288,939,461.81/101,970.90
  6. Step 6: Final answer
    x = 130,320.90

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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.