Home / 78,875.30-118,082.55-70,580.90

Finding the Fourth Proportional to 78,875.30, 118,082.55 and 70,580.90

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Solution

The fourth proportional to 78,875.30, 118,082.55 and 70,580.90 is: 105,665.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,875.30 : 118,082.55 = 70,580.90 : x
  2. Step 2: Convert to fraction form
    78,875.30/118,082.55 = 70,580.90/x
  3. Step 3: Cross multiply
    78,875.30x = 118,082.55 × 70,580.90
  4. Step 4: Simplify right side
    78,875.30x = 8,334,372,653.30
  5. Step 5: Solve for x
    x = 8,334,372,653.30/78,875.30
  6. Step 6: Final answer
    x = 105,665.18

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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.