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Finding the Fourth Proportional to 104,835.80, 157,080.90 and 87,210.20

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Solution

The fourth proportional to 104,835.80, 157,080.90 and 87,210.20 is: 130,671.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,835.80 : 157,080.90 = 87,210.20 : x
  2. Step 2: Convert to fraction form
    104,835.80/157,080.90 = 87,210.20/x
  3. Step 3: Cross multiply
    104,835.80x = 157,080.90 × 87,210.20
  4. Step 4: Simplify right side
    104,835.80x = 13,699,056,705.18
  5. Step 5: Solve for x
    x = 13,699,056,705.18/104,835.80
  6. Step 6: Final answer
    x = 130,671.55

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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.