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Finding the Fourth Proportional to 98,998.40, 148,468.80 and 54,646.40

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Solution

The fourth proportional to 98,998.40, 148,468.80 and 54,646.40 is: 81,953.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,998.40 : 148,468.80 = 54,646.40 : x
  2. Step 2: Convert to fraction form
    98,998.40/148,468.80 = 54,646.40/x
  3. Step 3: Cross multiply
    98,998.40x = 148,468.80 × 54,646.40
  4. Step 4: Simplify right side
    98,998.40x = 8,113,285,432.32
  5. Step 5: Solve for x
    x = 8,113,285,432.32/98,998.40
  6. Step 6: Final answer
    x = 81,953.70

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1.5x scale

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.