Home / 78,875.10-118,312.65-48,807.90

Finding the Fourth Proportional to 78,875.10, 118,312.65 and 48,807.90

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Solution

The fourth proportional to 78,875.10, 118,312.65 and 48,807.90 is: 73,211.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,875.10 : 118,312.65 = 48,807.90 : x
  2. Step 2: Convert to fraction form
    78,875.10/118,312.65 = 48,807.90/x
  3. Step 3: Cross multiply
    78,875.10x = 118,312.65 × 48,807.90
  4. Step 4: Simplify right side
    78,875.10x = 5,774,591,989.94
  5. Step 5: Solve for x
    x = 5,774,591,989.94/78,875.10
  6. Step 6: Final answer
    x = 73,211.85

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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.