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Finding the Fourth Proportional to 81,788,981.78, 112,866,978.39 and 45,119,543.06

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Solution

The fourth proportional to 81,788,981.78, 112,866,978.39 and 45,119,543.06 is: 62,263,967.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,788,981.78 : 112,866,978.39 = 45,119,543.06 : x
  2. Step 2: Convert to fraction form
    81,788,981.78/112,866,978.39 = 45,119,543.06/x
  3. Step 3: Cross multiply
    81,788,981.78x = 112,866,978.39 × 45,119,543.06
  4. Step 4: Simplify right side
    81,788,981.78x = 5,092,506,491,632,664
  5. Step 5: Solve for x
    x = 5,092,506,491,632,664/81,788,981.78
  6. Step 6: Final answer
    x = 62,263,967.35

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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.