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Finding the Fourth Proportional to 93,908.80, 141,208.80 and 78,702.40

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Solution

The fourth proportional to 93,908.80, 141,208.80 and 78,702.40 is: 118,343.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,908.80 : 141,208.80 = 78,702.40 : x
  2. Step 2: Convert to fraction form
    93,908.80/141,208.80 = 78,702.40/x
  3. Step 3: Cross multiply
    93,908.80x = 141,208.80 × 78,702.40
  4. Step 4: Simplify right side
    93,908.80x = 11,113,471,461.12
  5. Step 5: Solve for x
    x = 11,113,471,461.12/93,908.80
  6. Step 6: Final answer
    x = 118,343.24

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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.