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Finding the Fourth Proportional to 157,210.61, 216,951.53 and 85,590.45

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Solution

The fourth proportional to 157,210.61, 216,951.53 and 85,590.45 is: 118,115.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,210.61 : 216,951.53 = 85,590.45 : x
  2. Step 2: Convert to fraction form
    157,210.61/216,951.53 = 85,590.45/x
  3. Step 3: Cross multiply
    157,210.61x = 216,951.53 × 85,590.45
  4. Step 4: Simplify right side
    157,210.61x = 18,568,978,652.94
  5. Step 5: Solve for x
    x = 18,568,978,652.94/157,210.61
  6. Step 6: Final answer
    x = 118,115.31

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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.