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Finding the Fourth Proportional to 156,210.80, 215,518 and 102,490.80

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Solution

The fourth proportional to 156,210.80, 215,518 and 102,490.80 is: 141,402.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,210.80 : 215,518 = 102,490.80 : x
  2. Step 2: Convert to fraction form
    156,210.80/215,518 = 102,490.80/x
  3. Step 3: Cross multiply
    156,210.80x = 215,518 × 102,490.80
  4. Step 4: Simplify right side
    156,210.80x = 22,088,612,234.40
  5. Step 5: Solve for x
    x = 22,088,612,234.40/156,210.80
  6. Step 6: Final answer
    x = 141,402.59

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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.