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Finding the Fourth Proportional to 159,350.86, 219,854.53 and 90,428.90

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Solution

The fourth proportional to 159,350.86, 219,854.53 and 90,428.90 is: 124,763.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,350.86 : 219,854.53 = 90,428.90 : x
  2. Step 2: Convert to fraction form
    159,350.86/219,854.53 = 90,428.90/x
  3. Step 3: Cross multiply
    159,350.86x = 219,854.53 × 90,428.90
  4. Step 4: Simplify right side
    159,350.86x = 19,881,203,307.92
  5. Step 5: Solve for x
    x = 19,881,203,307.92/159,350.86
  6. Step 6: Final answer
    x = 124,763.70

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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.