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Finding the Fourth Proportional to 69,903,206.40, 104,854,809.60 and 47,060,428.80

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Solution

The fourth proportional to 69,903,206.40, 104,854,809.60 and 47,060,428.80 is: 70,590,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,903,206.40 : 104,854,809.60 = 47,060,428.80 : x
  2. Step 2: Convert to fraction form
    69,903,206.40/104,854,809.60 = 47,060,428.80/x
  3. Step 3: Cross multiply
    69,903,206.40x = 104,854,809.60 × 47,060,428.80
  4. Step 4: Simplify right side
    69,903,206.40x = 4,934,512,301,518,356
  5. Step 5: Solve for x
    x = 4,934,512,301,518,356/69,903,206.40
  6. Step 6: Final answer
    x = 70,590,643.20

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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.