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Finding the Fourth Proportional to 98,813.70, 148,248.30 and 39,690.90

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Solution

The fourth proportional to 98,813.70, 148,248.30 and 39,690.90 is: 59,547.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,813.70 : 148,248.30 = 39,690.90 : x
  2. Step 2: Convert to fraction form
    98,813.70/148,248.30 = 39,690.90/x
  3. Step 3: Cross multiply
    98,813.70x = 148,248.30 × 39,690.90
  4. Step 4: Simplify right side
    98,813.70x = 5,884,108,450.47
  5. Step 5: Solve for x
    x = 5,884,108,450.47/98,813.70
  6. Step 6: Final answer
    x = 59,547.50

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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.