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Finding the Fourth Proportional to 58,368.88, 87,561.96 and 21,430

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Solution

The fourth proportional to 58,368.88, 87,561.96 and 21,430 is: 32,148.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,368.88 : 87,561.96 = 21,430 : x
  2. Step 2: Convert to fraction form
    58,368.88/87,561.96 = 21,430/x
  3. Step 3: Cross multiply
    58,368.88x = 87,561.96 × 21,430
  4. Step 4: Simplify right side
    58,368.88x = 1,876,452,802.80
  5. Step 5: Solve for x
    x = 1,876,452,802.80/58,368.88
  6. Step 6: Final answer
    x = 32,148.17

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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.