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Finding the Fourth Proportional to 64,878.40, 89,531.91 and 35,070.40

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Solution

The fourth proportional to 64,878.40, 89,531.91 and 35,070.40 is: 48,397.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,878.40 : 89,531.91 = 35,070.40 : x
  2. Step 2: Convert to fraction form
    64,878.40/89,531.91 = 35,070.40/x
  3. Step 3: Cross multiply
    64,878.40x = 89,531.91 × 35,070.40
  4. Step 4: Simplify right side
    64,878.40x = 3,139,919,896.46
  5. Step 5: Solve for x
    x = 3,139,919,896.46/64,878.40
  6. Step 6: Final answer
    x = 48,397.00

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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.