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Finding the Fourth Proportional to 71,220,005.80, 106,830,008.70 and 70,464,178.60

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Solution

The fourth proportional to 71,220,005.80, 106,830,008.70 and 70,464,178.60 is: 105,696,267.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,220,005.80 : 106,830,008.70 = 70,464,178.60 : x
  2. Step 2: Convert to fraction form
    71,220,005.80/106,830,008.70 = 70,464,178.60/x
  3. Step 3: Cross multiply
    71,220,005.80x = 106,830,008.70 × 70,464,178.60
  4. Step 4: Simplify right side
    71,220,005.80x = 7,527,688,812,876,353
  5. Step 5: Solve for x
    x = 7,527,688,812,876,353/71,220,005.80
  6. Step 6: Final answer
    x = 105,696,267.90

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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.