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Finding the Fourth Proportional to 60,808,728.40, 91,085,911.80 and 28,488,216.40

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Solution

The fourth proportional to 60,808,728.40, 91,085,911.80 and 28,488,216.40 is: 42,672,741.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,808,728.40 : 91,085,911.80 = 28,488,216.40 : x
  2. Step 2: Convert to fraction form
    60,808,728.40/91,085,911.80 = 28,488,216.40/x
  3. Step 3: Cross multiply
    60,808,728.40x = 91,085,911.80 × 28,488,216.40
  4. Step 4: Simplify right side
    60,808,728.40x = 2,594,875,166,349,713.50
  5. Step 5: Solve for x
    x = 2,594,875,166,349,713.50/60,808,728.40
  6. Step 6: Final answer
    x = 42,672,741.80

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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.