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Finding the Fourth Proportional to 74,984,712.60, 112,477,068.90 and 21,132,024.60

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Solution

The fourth proportional to 74,984,712.60, 112,477,068.90 and 21,132,024.60 is: 31,698,036.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,984,712.60 : 112,477,068.90 = 21,132,024.60 : x
  2. Step 2: Convert to fraction form
    74,984,712.60/112,477,068.90 = 21,132,024.60/x
  3. Step 3: Cross multiply
    74,984,712.60x = 112,477,068.90 × 21,132,024.60
  4. Step 4: Simplify right side
    74,984,712.60x = 2,376,868,186,930,695
  5. Step 5: Solve for x
    x = 2,376,868,186,930,695/74,984,712.60
  6. Step 6: Final answer
    x = 31,698,036.90

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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.