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Finding the Fourth Proportional to 98,937.60, 136,542.56 and 56,509.76

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Solution

The fourth proportional to 98,937.60, 136,542.56 and 56,509.76 is: 77,988.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,937.60 : 136,542.56 = 56,509.76 : x
  2. Step 2: Convert to fraction form
    98,937.60/136,542.56 = 56,509.76/x
  3. Step 3: Cross multiply
    98,937.60x = 136,542.56 × 56,509.76
  4. Step 4: Simplify right side
    98,937.60x = 7,715,987,295.39
  5. Step 5: Solve for x
    x = 7,715,987,295.39/98,937.60
  6. Step 6: Final answer
    x = 77,988.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.