Home / 212,779,618.60-319,169,427.90-121,828,412.20

Finding the Fourth Proportional to 212,779,618.60, 319,169,427.90 and 121,828,412.20

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Solution

The fourth proportional to 212,779,618.60, 319,169,427.90 and 121,828,412.20 is: 182,742,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,779,618.60 : 319,169,427.90 = 121,828,412.20 : x
  2. Step 2: Convert to fraction form
    212,779,618.60/319,169,427.90 = 121,828,412.20/x
  3. Step 3: Cross multiply
    212,779,618.60x = 319,169,427.90 × 121,828,412.20
  4. Step 4: Simplify right side
    212,779,618.60x = 38,883,904,623,839,376
  5. Step 5: Solve for x
    x = 38,883,904,623,839,376/212,779,618.60
  6. Step 6: Final answer
    x = 182,742,618.30

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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.