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Finding the Fourth Proportional to 71,644.90, 98,864.13 and 42,970.90

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Solution

The fourth proportional to 71,644.90, 98,864.13 and 42,970.90 is: 59,296.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,644.90 : 98,864.13 = 42,970.90 : x
  2. Step 2: Convert to fraction form
    71,644.90/98,864.13 = 42,970.90/x
  3. Step 3: Cross multiply
    71,644.90x = 98,864.13 × 42,970.90
  4. Step 4: Simplify right side
    71,644.90x = 4,248,280,643.82
  5. Step 5: Solve for x
    x = 4,248,280,643.82/71,644.90
  6. Step 6: Final answer
    x = 59,296.34

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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.