Home / 78,678,001.80-118,017,002.70-77,166,347.40

Finding the Fourth Proportional to 78,678,001.80, 118,017,002.70 and 77,166,347.40

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Solution

The fourth proportional to 78,678,001.80, 118,017,002.70 and 77,166,347.40 is: 115,749,521.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678,001.80 : 118,017,002.70 = 77,166,347.40 : x
  2. Step 2: Convert to fraction form
    78,678,001.80/118,017,002.70 = 77,166,347.40/x
  3. Step 3: Cross multiply
    78,678,001.80x = 118,017,002.70 × 77,166,347.40
  4. Step 4: Simplify right side
    78,678,001.80x = 9,106,941,029,454,938
  5. Step 5: Solve for x
    x = 9,106,941,029,454,938/78,678,001.80
  6. Step 6: Final answer
    x = 115,749,521.10

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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.