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Finding the Fourth Proportional to 157,055.12, 216,736.71 and 85,435.55

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Solution

The fourth proportional to 157,055.12, 216,736.71 and 85,435.55 is: 117,901.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,055.12 : 216,736.71 = 85,435.55 : x
  2. Step 2: Convert to fraction form
    157,055.12/216,736.71 = 85,435.55/x
  3. Step 3: Cross multiply
    157,055.12x = 216,736.71 × 85,435.55
  4. Step 4: Simplify right side
    157,055.12x = 18,517,020,024.04
  5. Step 5: Solve for x
    x = 18,517,020,024.04/157,055.12
  6. Step 6: Final answer
    x = 117,901.41

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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.