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Finding the Fourth Proportional to 56,171,803.20, 78,746,692.80 and 56,171,803.20

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Solution

The fourth proportional to 56,171,803.20, 78,746,692.80 and 56,171,803.20 is: 78,746,692.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,171,803.20 : 78,746,692.80 = 56,171,803.20 : x
  2. Step 2: Convert to fraction form
    56,171,803.20/78,746,692.80 = 56,171,803.20/x
  3. Step 3: Cross multiply
    56,171,803.20x = 78,746,692.80 × 56,171,803.20
  4. Step 4: Simplify right side
    56,171,803.20x = 4,423,343,730,612,457
  5. Step 5: Solve for x
    x = 4,423,343,730,612,457/56,171,803.20
  6. Step 6: Final answer
    x = 78,746,692.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.