Home / 80,762,437.40-121,143,656.10-72,700,280.60

Finding the Fourth Proportional to 80,762,437.40, 121,143,656.10 and 72,700,280.60

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Solution

The fourth proportional to 80,762,437.40, 121,143,656.10 and 72,700,280.60 is: 109,050,420.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,762,437.40 : 121,143,656.10 = 72,700,280.60 : x
  2. Step 2: Convert to fraction form
    80,762,437.40/121,143,656.10 = 72,700,280.60/x
  3. Step 3: Cross multiply
    80,762,437.40x = 121,143,656.10 × 72,700,280.60
  4. Step 4: Simplify right side
    80,762,437.40x = 8,807,177,791,379,901
  5. Step 5: Solve for x
    x = 8,807,177,791,379,901/80,762,437.40
  6. Step 6: Final answer
    x = 109,050,420.90

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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.