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Finding the Fourth Proportional to 156,984.32, 216,637.20 and 85,364.32

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Solution

The fourth proportional to 156,984.32, 216,637.20 and 85,364.32 is: 117,802.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,984.32 : 216,637.20 = 85,364.32 : x
  2. Step 2: Convert to fraction form
    156,984.32/216,637.20 = 85,364.32/x
  3. Step 3: Cross multiply
    156,984.32x = 216,637.20 × 85,364.32
  4. Step 4: Simplify right side
    156,984.32x = 18,493,087,264.70
  5. Step 5: Solve for x
    x = 18,493,087,264.70/156,984.32
  6. Step 6: Final answer
    x = 117,802.13

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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.