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Finding the Fourth Proportional to 145,420.71, 218,247.72 and 75,320.07

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Solution

The fourth proportional to 145,420.71, 218,247.72 and 75,320.07 is: 113,040.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,420.71 : 218,247.72 = 75,320.07 : x
  2. Step 2: Convert to fraction form
    145,420.71/218,247.72 = 75,320.07/x
  3. Step 3: Cross multiply
    145,420.71x = 218,247.72 × 75,320.07
  4. Step 4: Simplify right side
    145,420.71x = 16,438,433,547.74
  5. Step 5: Solve for x
    x = 16,438,433,547.74/145,420.71
  6. Step 6: Final answer
    x = 113,040.53

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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.