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Finding the Fourth Proportional to 157,603.42, 217,510.86 and 87,759.75

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Solution

The fourth proportional to 157,603.42, 217,510.86 and 87,759.75 is: 121,118.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,603.42 : 217,510.86 = 87,759.75 : x
  2. Step 2: Convert to fraction form
    157,603.42/217,510.86 = 87,759.75/x
  3. Step 3: Cross multiply
    157,603.42x = 217,510.86 × 87,759.75
  4. Step 4: Simplify right side
    157,603.42x = 19,088,698,695.89
  5. Step 5: Solve for x
    x = 19,088,698,695.89/157,603.42
  6. Step 6: Final answer
    x = 121,118.56

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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.