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Finding the Fourth Proportional to 78,798.36, 117,582.95 and 70,306.50

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Solution

The fourth proportional to 78,798.36, 117,582.95 and 70,306.50 is: 104,911.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,798.36 : 117,582.95 = 70,306.50 : x
  2. Step 2: Convert to fraction form
    78,798.36/117,582.95 = 70,306.50/x
  3. Step 3: Cross multiply
    78,798.36x = 117,582.95 × 70,306.50
  4. Step 4: Simplify right side
    78,798.36x = 8,266,845,674.18
  5. Step 5: Solve for x
    x = 8,266,845,674.18/78,798.36
  6. Step 6: Final answer
    x = 104,911.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.