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Finding the Fourth Proportional to 157,488.89, 217,330.74 and 85,870.31

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Solution

The fourth proportional to 157,488.89, 217,330.74 and 85,870.31 is: 118,498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,488.89 : 217,330.74 = 85,870.31 : x
  2. Step 2: Convert to fraction form
    157,488.89/217,330.74 = 85,870.31/x
  3. Step 3: Cross multiply
    157,488.89x = 217,330.74 × 85,870.31
  4. Step 4: Simplify right side
    157,488.89x = 18,662,258,016.33
  5. Step 5: Solve for x
    x = 18,662,258,016.33/157,488.89
  6. Step 6: Final answer
    x = 118,498.89

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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.