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Finding the Fourth Proportional to 91,307.79, 136,948.93 and 31,335.32

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Solution

The fourth proportional to 91,307.79, 136,948.93 and 31,335.32 is: 46,998.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,307.79 : 136,948.93 = 31,335.32 : x
  2. Step 2: Convert to fraction form
    91,307.79/136,948.93 = 31,335.32/x
  3. Step 3: Cross multiply
    91,307.79x = 136,948.93 × 31,335.32
  4. Step 4: Simplify right side
    91,307.79x = 4,291,338,809.24
  5. Step 5: Solve for x
    x = 4,291,338,809.24/91,307.79
  6. Step 6: Final answer
    x = 46,998.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.