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Finding the Fourth Proportional to 72,291,981.60, 108,437,281.20 and 17,704,807.20

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Solution

The fourth proportional to 72,291,981.60, 108,437,281.20 and 17,704,807.20 is: 26,557,041.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291,981.60 : 108,437,281.20 = 17,704,807.20 : x
  2. Step 2: Convert to fraction form
    72,291,981.60/108,437,281.20 = 17,704,807.20/x
  3. Step 3: Cross multiply
    72,291,981.60x = 108,437,281.20 × 17,704,807.20
  4. Step 4: Simplify right side
    72,291,981.60x = 1,919,861,156,938,184.50
  5. Step 5: Solve for x
    x = 1,919,861,156,938,184.50/72,291,981.60
  6. Step 6: Final answer
    x = 26,557,041.52

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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.