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Finding the Fourth Proportional to 157,225.60, 216,969.78 and 85,605.40

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Solution

The fourth proportional to 157,225.60, 216,969.78 and 85,605.40 is: 118,134.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,225.60 : 216,969.78 = 85,605.40 : x
  2. Step 2: Convert to fraction form
    157,225.60/216,969.78 = 85,605.40/x
  3. Step 3: Cross multiply
    157,225.60x = 216,969.78 × 85,605.40
  4. Step 4: Simplify right side
    157,225.60x = 18,573,784,804.81
  5. Step 5: Solve for x
    x = 18,573,784,804.81/157,225.60
  6. Step 6: Final answer
    x = 118,134.61

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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.