Home / 78,038.40-107,693.64-45,792.30

Finding the Fourth Proportional to 78,038.40, 107,693.64 and 45,792.30

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Solution

The fourth proportional to 78,038.40, 107,693.64 and 45,792.30 is: 63,193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,038.40 : 107,693.64 = 45,792.30 : x
  2. Step 2: Convert to fraction form
    78,038.40/107,693.64 = 45,792.30/x
  3. Step 3: Cross multiply
    78,038.40x = 107,693.64 × 45,792.30
  4. Step 4: Simplify right side
    78,038.40x = 4,931,539,470.97
  5. Step 5: Solve for x
    x = 4,931,539,470.97/78,038.40
  6. Step 6: Final answer
    x = 63,193.75

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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.