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Finding the Fourth Proportional to 156,955.38, 216,598.95 and 85,335.18

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Solution

The fourth proportional to 156,955.38, 216,598.95 and 85,335.18 is: 117,762.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,955.38 : 216,598.95 = 85,335.18 : x
  2. Step 2: Convert to fraction form
    156,955.38/216,598.95 = 85,335.18/x
  3. Step 3: Cross multiply
    156,955.38x = 216,598.95 × 85,335.18
  4. Step 4: Simplify right side
    156,955.38x = 18,483,510,386.06
  5. Step 5: Solve for x
    x = 18,483,510,386.06/156,955.38
  6. Step 6: Final answer
    x = 117,762.83

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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.